si4
four; 4

strokes 5
radical
strokes after radical 2
巴三览四 巴三覽四 ba1 san1 lan3 si4
to talk about this and that (idiom); to ramble incoherently

板板六十四 板板六十四 ban3 ban3 liu4 shi2 si4
unaccommodating; rigid

北宋四大部书 北宋四大部書 bei3 song4 si4 da4 bu4 shu1
Four great compilations of Northern Song dynasty, namely: Extensive records of the Taiping era (978) 太平廣記|太平广记, Imperial readings of the Taiping era 太平御覽|太平御览, Prime tortoise of the record bureau 冊府元龜|册府元龟, Finest blossoms in the garden of literature 文苑英華

不规则四边形 不規則四邊形 bu4 gui1 ze2 si4 bian1 xing2
irregular quadrilateral; trapezium

不三不四 不三不四 bu4 san1 bu4 si4
dubious; shady; neither one thing nor the other; neither fish nor fowl; nondescript

传播四方 傳播四方 chuan2 bo1 si4 fang1
to disseminate in every direction (idiom)

传三过四 傳三過四 chuan2 san1 guo4 si4
to spread rumors; to gossip

大四 大四 da4 si4
fourth-year university student

低三下四 低三下四 di1 san1 xia4 si4
servile

第四季 第四季 di4 si4 ji4
fourth quarter

第四纪 第四紀 di4 si4 ji4
fourth period; quaternary (geological period covering the recent ice ages over the last 180,000 years)

第四季度 第四季度 di4 si4 ji4 du4
fourth quarter (of financial year)

第四声 第四聲 di4 si4 sheng1
fourth tone in Mandarin; falling tone

第四台 第四臺 di4 si4 tai2
fourth channel; (in Taiwan) cable TV, FTV

颠三倒四 顛三倒四 dian1 san1 dao3 si4
confused; disorderly; incoherent

丢三落四 丟三落四 diu1 san1 la4 si4
forgetful; empty-headed

二十四节气 二十四節氣 er4 shi2 si4 jie2 qi5
the 24 solar terms, calculated from the position of the sun on the ecliptic, that divide the year into 24 equal periods

二十四史 二十四史 er4 shi2 si4 shi3
the Twenty-Four Histories (25 or 26 in modern editions), collection of books on Chinese dynastic history from 3000 BC till 17th century; fig. a long and complicated story

二十四孝 二十四孝 er4 shi2 si4 xiao4
the Twenty-four Filial Exemplars, classic Confucian text on filial piety from Yuan dynasty

放之四海而皆准 放之四海而皆准 fang4 zhi1 si4 hai3 er2 jie1 zhun3
appropriate to any place and any time (idiom); universally applicable; a panacea

放之四海而皆准 放之四海而皆準 fang4 zhi1 si4 hai3 er2 jie1 zhun3
applicable anywhere (idiom)

飞沫四溅 飛沫四濺 fei1 mo4 si4 jian4
to spray in all directions

烽火四起 烽火四起 feng1 huo3 si4 qi3
the fire of war in all four directions (idiom); the confusion of war

烽烟四起 烽煙四起 feng1 yan1 si4 qi3
lit. fire beacons in all four directions (idiom); the confusion of war

烽烟四起,战火纷飞 烽煙四起,戰火紛飛 feng1 yan1 si4 qi3 - zhan4 huo3 fen1 fei1
lit. fire beacons in all four directions (idiom); the confusion of war

干煸四季豆 乾煸四季豆 gan1 bian1 si4 ji4 dou4
fried beans, Sichuan style

勾三搭四 勾三搭四 gou1 san1 da1 si4
to make hanky-panky; to seduce women

股四头肌 股四頭肌 gu3 si4 tou2 ji1
quadriceps muscle group; thigh muscles

汉四郡 漢四郡 han4 si4 jun4
four Han commanderies in north Korea 108 BC-c. 300 AD

核四 核四 he2 si4
Fourth Nuclear Power Plant near New Taipei City 新北市, Taiwan; also called Lungmen Nuclear Power Plant

核四级共振 核四級共振 he2 si4 ji2 gong4 zhen4
nuclear quadrupole resonance (physics)

合四乙尺工 合四乙尺工 he2 si4 yi3 chi3 gong1
names of the five notes of the Chinese pentatonic scale, corresponding roughly to do, re, mi, sol, la

横三竖四 橫三豎四 heng2 san1 shu4 si4
in disorder; in a tremendous mess

活力四射 活力四射 huo2 li4 si4 she4
dynamic; enthusiastic; energetic

家徒四壁 家徒四壁 jia1 tu2 si4 bi4
lit. with only four bare walls for a home (idiom); fig. very poor; wretched

江南四大才子 江南四大才子 jiang1 nan2 si4 da4 cai2 zi3
Four great southern talents of the Ming, namely: Tang Bohu 唐伯虎, Zhu Zhishan 祝枝山, Wen Zhengming 文徵明|文征明 and Xu Zhenqing 徐禎卿|徐祯卿

街坊四邻 街坊四鄰 jie1 fang5 si4 lin2
neighbors; the whole neighborhood

金砖四国 金磚四國 jin1 zhuan1 si4 guo2
Brazil, Russia, India and China (BRIC)

聚四氟乙烯 聚四氟乙烯 ju4 si4 fu2 yi3 xi1
polytetrafluoroethylene

狂三诈四 狂三詐四 kuang2 san1 zha4 si4
to deceive and swindle across the board (idiom)

狼烟四起 狼煙四起 lang2 yan1 si4 qi3
fire beacons on all sides (idiom); enveloped in the flames of war

礼拜四 禮拜四 li3 bai4 si4
Thursday

李四 李四 li3 si4
Li Si, name for an unspecified person, second of a series of three: 張三|张三, 李四, 王五 Tom, Dick and Harry

李四光 李四光 li3 si4 guang1
Li Siguang (1889-1971), Mongol-born, Japanese trained geologist, prominent in early PRC oil exploration

连三并四 連三併四 lian2 san1 bing4 si4
one after the other; in succession (idiom)

六朝四大家 六朝四大家 liu4 chao2 si4 da4 jia1
Four Great Painters of the Six dynasties, namely: Cao Buxing 曹不興|曹不兴, Gu Kaizhi 顧愷之|顾恺之, Lu Tanwei 陸探微|陆探微 and Zhang Sengyou 張僧繇|张僧繇

六十四卦 六十四卦 liu4 shi2 si4 gua4
the 64 hexagrams of the Book of Changes (I Ching or Yi Jing) 易經|易经

六十四位元 六十四位元 liu4 shi2 si4 wei4 yuan2
64-bit (computing)

六四 六四 liu4 si4
refers to Tiananmen incident of 4th June 1989

六四事件 六四事件 liu4 si4 shi4 jian4
Tiananmen Incident of June 4, 1989

魅力四射 魅力四射 mei4 li4 si4 she4
glamorous; charming; seductive

名扬四海 名揚四海 ming2 yang2 si4 hai3
to become known far and wide (idiom); famous

目空四海 目空四海 mu4 kong1 si4 hai3
the eye can see nothing worthwhile all around (idiom); arrogant; condescending; supercilious

廿四史 廿四史 nian4 si4 shi3
twenty four dynastic histories (or 25 or 26 in modern editions); same as 二十四史

披头四乐团 披頭四樂團 pi1 tou2 si4 yue4 tuan2
the Beatles

平行四边形 平行四邊形 ping2 xing2 si4 bian1 xing2
parallelogram

破四旧 破四舊 po4 si4 jiu4
Destroy the Four Olds (campaign of the Cultural Revolution)

七政四余 七政四餘 qi1 zheng4 si4 yu2
seven heavenly bodies and four imaginary stars (in astrology and fengshui)

三从四德 三從四德 san1 cong2 si4 de2
Confucian moral injunctions for women, namely: obey in turn three men father, husband and son, plus the four virtues of morality 德, physical charm 容, propriety in speech 言 and efficiency in needlework 功

三催四请 三催四請 san1 cui1 si4 qing3
to coax and plead

三朋四友 三朋四友 san1 peng2 si4 you3
friends; cronies

十四 十四 shi2 si4
fourteen; 14

十四行诗 十四行詩 shi2 si4 hang2 shi1
sonnet

说三道四 說三道四 shuo1 san1 dao4 si4
to make thoughtless remarks (idiom); to criticize; gossip

四壁萧然 四壁蕭然 si4 bi4 xiao1 ran2
four bare walls

四边 四邊 si4 bian1
four sides

四边形 四邊形 si4 bian1 xing2
quadrilateral

四部曲 四部曲 si4 bu4 qu3
tetralogy

四重奏 四重奏 si4 chong2 zou4
quartet (musical ensemble)

四处 四處 si4 chu4
all over the place; everywhere and all directions

四川 四川 si4 chuan1
Sichuan province (Szechuan) in southwest China, abbr. 川 or 蜀, capital Chengdu 成都

四川大地震 四川大地震 si4 chuan1 da4 di4 zhen4
Great Sichuan Earthquake (2008)

四川大学 四川大學 si4 chuan1 da4 xue2
Sichuan University

四川林鸮 四川林鴞 si4 chuan1 lin2 xiao1
(bird species of China) Sichuan wood owl (Strix davidi)

四川柳莺 四川柳鶯 si4 chuan1 liu3 ying1
(bird species of China) Sichuan leaf warbler (Phylloscopus forresti)

四川盆地 四川盆地 si4 chuan1 pen2 di4
Sichuan basin

四川日报 四川日報 si4 chuan1 ri4 bao4
Sichuan Daily

四川山鹧鸪 四川山鷓鴣 si4 chuan1 shan1 zhe4 gu1
(bird species of China) Sichuan partridge (Arborophila rufipectus)

四川省 四川省 si4 chuan1 sheng3
Sichuan province (Szechuan) in southwest China, abbr. 川 or 蜀, capital Chengdu 成都

四川外国语大学 四川外國語大學 si4 chuan1 wai4 guo2 yu3 da4 xue2
Sichuan International Studies University (SISU)

四川旋木雀 四川旋木雀 si4 chuan1 xuan2 mu4 que4
(bird species of China) Sichuan treecreeper (Certhia tianquanensis)

四川雉鹑 四川雉鶉 si4 chuan1 zhi4 chun2
(bird species of China) buff-throated monal-partridge (Tetraophasis szechenyii)

四次 四次 si4 ci4
fourth; four times; quartic

四大 四大 si4 da4
the four elements: earth, water, fire, and wind (Buddhism); the four freedoms: speaking out freely, airing views fully, holding great debates, and writing big-character posters, 大鳴大放|大鸣大放, 大辯論|大辩论, 大字報|大字报 (PRC)

四大发明 四大發明 si4 da4 fa1 ming2
the four great Chinese inventions: paper, printing, magnetic compass and gunpowder

四大佛教名山 四大佛教名山 si4 da4 fo2 jiao4 ming2 shan1
Four Sacred Mountains of Buddhism, namely: Mt Wutai 五臺山|五台山 in Shanxi, Mt Emei 峨眉山 in Sichuan, Mt Jiuhua 九華山|九华山 in Anhui, Mt Potala 普陀山 in Zhejiang

四大皆空 四大皆空 si4 da4 jie1 kong1
lit. the four elements are vanity (idiom); this world is an illusion

四大美女 四大美女 si4 da4 mei3 nv3
Four legendary beauties of ancient China, namely: Xishi 西施, Wang Zhaojun 王昭君, Diaochan 貂蟬|貂蝉 and Yang Yuhuan 楊玉環|杨玉环

四大名著 四大名著 si4 da4 ming2 zhu4
the Four Classic Novels of Chinese literature, namely: A Dream of Red Mansions 紅樓夢|红楼梦, Romance of Three Kingdoms 三國演義|三国演义, Water Margin 水滸傳|水浒传, Journey to the West 西遊記|西游记

四大盆地 四大盆地 si4 da4 pen2 di4
four great basin depressions of China, namely: Tarim 塔里木盆地 in south Xinjiang, Jungar 準葛爾盆地|准葛尔盆地 and Tsaidam or Qaidam 柴達木盆地|柴达木盆地 in north Xinjiang Sichuan 四川盆地

四大石窟 四大石窟 si4 da4 shi2 ku1
Four great caves, namely: Longmen grottoes 龍門石窟|龙门石窟 at Luoyang, Henan, Yungang caves 雲岡石窟|云冈石窟 at Datong, Shanxi, Mogao caves 莫高窟 at Dunhuang, Gansu, and Mt Maiji caves 麥積山石窟|麦积山石窟 at Tianshui, Gansu

四大天王 四大天王 si4 da4 tian1 wang2
the four heavenly kings (Sanskrit vajra); the four guardians or warrior attendants of Buddha

四大须生 四大鬚生 si4 da4 xu1 sheng1
Four great beards of Beijing opera, namely: Ma Lianliang 馬連良|马连良, Tan Fuying 譚富英|谭富英, Yang Baosen 楊寶森|杨宝森, Xi Xiaobo 奚嘯伯|奚啸伯

四德 四德 si4 de2
four Confucian injunctions 孝悌忠信 (for men), namely: piety 孝 to one's parents, respect 悌 to one's older brother, loyalty 忠 to one's monarch, faith 信 to one's male friends; the four Confucian virtues for women of morality 德, physical charm 容, propriety in sp

四谛 四諦 si4 di4
the Four Noble Truths (Budd.), covered by the acronym 苦集滅道: all life is suffering 苦, the cause of suffering is desire 集, emancipation comes only by eliminating passions 滅|灭, the way 道 to emancipation is the Eight-fold Noble Way 八正道

四方 四方 si4 fang1
four-way; four-sided; in all directions; everywhere

四方步 四方步 si4 fang1 bu4
a slow march

四方脸 四方臉 si4 fang1 lian3
square-jawed face

四方帽 四方帽 si4 fang1 mao4
see 方帽

四方区 四方區 si4 fang1 qu1
Sifang district of Qingdao city 青島市|青岛市, Shandong

四方台 四方臺 si4 fang1 tai2
Sifangtai district of Shuangyashan city 雙鴨山|双鸭山, Heilongjiang

四方台区 四方臺區 si4 fang1 tai2 qu1
Sifangtai district of Shuangyashan city 雙鴨山|双鸭山, Heilongjiang

四分卫 四分衛 si4 fen1 wei4
quarterback (QB) (American football)

四分五裂 四分五裂 si4 fen1 wu3 lie4
all split up and in pieces (idiom); disunity (in an organization); complete lack of unity; to disintegrate; falling apart; to be at sixes and sevens

四分音符 四分音符 si4 fen1 yin1 fu2
crotchet (music)

四分之一 四分之一 si4 fen1 zhi1 yi1
one-quarter

四氟化硅 四氟化硅 si4 fu2 hua4 gui1
silicon tetrafluoride SiF4

四氟化铀 四氟化鈾 si4 fu2 hua4 you2
uranium tetrafluoride (UF4)

四个全面 四個全面 si4 ge5 quan2 mian4
Four Comprehensives (political guidelines announced by President Xi Jinping, 2015)

四个现代化 四個現代化 si4 ge5 xian4 dai4 hua4
Deng Xiaoping's four modernizations practiced from the 1980s (possibly planned together with Zhou Enlai), namely: modernization of industry, agriculture, national defense and science and technology; abbr. to 四化

四更 四更 si4 geng1
fourth of the five night watch periods 01:00-03:00 (old)

四顾 四顧 si4 gu4
to look around

四国 四國 si4 guo2
Shikoku (one of the four main islands of Japan)

四国犬 四國犬 si4 guo2 quan3
Shikoku (dog)

四海皆准 四海皆准 si4 hai3 jie1 zhun3
appropriate to any place and any time (idiom); universally applicable; a panacea

四海飘零 四海飄零 si4 hai3 piao1 ling2
drifting aimlessly all over the place (idiom)

四海升平 四海升平 si4 hai3 sheng1 ping2
lit. all four oceans are peaceful; worldwide peace (idiom)

四海为家 四海為家 si4 hai3 wei2 jia1
to regard the four corners of the world all as home (idiom); to feel at home anywhere; to roam about unconstrained; to consider the entire country, or world, to be one's own

四海之内皆兄弟 四海之內皆兄弟 si4 hai3 zhi1 nei4 jie1 xiong1 di4
all men are brothers

四害 四害 si4 hai4
"the four pests", i.e. rats, flies, mosquitoes, and sparrows; see also 打麻雀運動|打麻雀运动

四号电池 四號電池 si4 hao4 dian4 chi2
AAA battery (Tw); PRC equivalent: 七號電池|七号电池

四合院 四合院 si4 he2 yuan4
courtyard house (type of Chinese residence)

四湖 四湖 si4 hu2
Si or Ssuhu township in Yunlin county 雲林縣|云林县, Taiwan

四胡 四胡 si4 hu2
sihu (or "khuurchir" in Mongolian), a bowed instrument with four strings, primarily associated with Mongolian and Chinese culture

四湖乡 四湖鄉 si4 hu2 xiang1
Si or Ssuhu township in Yunlin county 雲林縣|云林县, Taiwan

四化 四化 si4 hua4
abbr. for 四個現代化|四个现代化, Deng Xiaoping's four modernizations

四环素 四環素 si4 huan2 su4
tetracycline

四会 四會 si4 hui4
Sihui county level city in Zhaoqing 肇慶|肇庆, Guangdong

四会市 四會市 si4 hui4 shi4
Sihui county level city in Zhaoqing 肇慶|肇庆, Guangdong

四级 四級 si4 ji2
grade 4; fourth class; category D

四级士官 四級士官 si4 ji2 shi4 guan1
sergeant first class

四季 四季 si4 ji4
four seasons, namely: spring 春, summer 夏, autumn 秋 and winter 冬

四季豆 四季豆 si4 ji4 dou4
green bean; French bean; runner bean

四季豆腐 四季豆腐 si4 ji4 dou4 fu5
four seasons beancurd

四季如春 四季如春 si4 ji4 ru2 chun1
four seasons like spring; favorable climate throughout the year

四溅 四濺 si4 jian4
(of droplets, sparks etc) to fly about in all directions; to splatter everywhere

四郊 四郊 si4 jiao1
suburb; outskirts (of town)

四角 四角 si4 jiao3
the four corners (of a rectangle); the eaves that the four corners of a building

四脚朝天 四腳朝天 si4 jiao3 chao2 tian1
four legs facing the sky (idiom); flat on one's back

四角号码 四角號碼 si4 jiao3 hao4 ma3
four corner code (input method for Chinese characters)

四角裤 四角褲 si4 jiao3 ku4
boxer shorts

四脚蛇 四腳蛇 si4 jiao3 she2
lizard; common spoken equivalent of 蜥蜴

四角形 四角形 si4 jiao3 xing2
square; quadrilateral

四角柱体 四角柱體 si4 jiao3 zhu4 ti3
cuboid; rectangular prism (math.)

四近 四近 si4 jin4
nearby

四境 四境 si4 jing4
all the borders

四旧 四舊 si4 jiu4
the Four Olds (target of the Cultural Revolution)

四库 四庫 si4 ku4
the four book depositories, namely: classics 經|经, history 史, philosophy 子, belle-lettres 集

四库全书 四庫全書 si4 ku4 quan2 shu1
Siku Quanshu (collection of books compiled during Qing dynasty)

四邻 四鄰 si4 lin2
one's nearest neighbors

四邻八舍 四鄰八捨 si4 lin2 ba1 she4
the whole neighborhood

四灵 四靈 si4 ling2
four divinities; four divine emperors; four mythical creatures symbolic of propsperity and longevity, namely phoenix 鳳|凤, turtle 龜|龟, dragon 龍|龙, Chinese unicorn 麒麟; also 四象, the four division of the sky

四轮定位 四輪定位 si4 lun2 ding4 wei4
wheel alignment (automobile maintenance)

四轮马车 四輪馬車 si4 lun2 ma3 che1
chariot

四轮驱动 四輪驅動 si4 lun2 qu1 dong4
four-wheel drive

四氯化碳 四氯化碳 si4 lv4 hua4 tan4
carbon tatrachloride

四氯乙烯 四氯乙烯 si4 lv4 yi3 xi1
tetrachloroethylene

四门轿车 四門轎車 si4 men2 jiao4 che1
sedan (motor car)

四面 四面 si4 mian4
all sides

四面八方 四面八方 si4 mian4 ba1 fang1
in all directions; all around; far and near

四面楚歌 四面楚歌 si4 mian4 chu3 ge1
lit. on all sides, the songs of Chu (idiom); fig. surrounded by enemies, isolated and without help

四面体 四面體 si4 mian4 ti3
tetrahedron

四民 四民 si4 min2
"the four classes" of ancient China, i.e. scholars, farmers, artisans, and merchants

四旁 四旁 si4 pang2
nearby regions

四平 四平 si4 ping2
Siping prefecture level city in Jilin province 吉林省 in northeast China

四平八稳 四平八穩 si4 ping2 ba1 wen3
everything steady and stable (idiom); overcautious and unimaginary

四平地区 四平地區 si4 ping2 di4 qu1
former Siping prefecture, Jilin

四平市 四平市 si4 ping2 shi4
Siping prefecture level city in Jilin province 吉林省 in northeast China

四起 四起 si4 qi3
to spring up everywhere; from all around

四强 四強 si4 qiang2
semifinals

四清 四清 si4 qing1
the Four Cleanups Movement (1963-66); abbr. for 四清運動|四清运动

四氢大麻酚 四氫大麻酚 si4 qing1 da4 ma2 fen1
Tetrahydrocannabinol, THC

四清运动 四清運動 si4 qing1 yun4 dong4
the Four Cleanups Movement (1963-66), which aimed to cleanse the politics, economy, organization and ideology of the Communist Party

四驱车 四驅車 si4 qu1 che1
four-by-four (vehicle); 4x4

四人帮 四人幫 si4 ren2 bang1
Gang of Four: Jiang Qing 江青, Zhang Chunqiao 張春橋, Yao Wenyuan 姚文元, Wang Hongwen 王洪文, who served as scapegoats for the excesses of the cultural revolution

四日市 四日市 si4 ri4 shi4
Yokaichi City in Mi'e prefecture 三重縣|三重县, Japan

四日市市 四日市市 si4 ri4 shi4 shi4
Yokkaichi, Mie prefecture 三重縣|三重县, Japan

四散 四散 si4 san4
to disperse; to scatter in all directions

四散奔逃 四散奔逃 si4 san4 ben1 tao2
to scatter in all directions

四舍五入 四捨五入 si4 she3 wu3 ru4
to round up to the nearest integer; to discard four, but treat five as whole (of decimal points)

四射 四射 si4 she4
to radiate all around

四声 四聲 si4 sheng1
the four tones of classical Chinese phonetics, namely: level or even tone 平聲|平声, third tone 上聲|上声, fourth tone 去聲|去声, entering tone 入聲|入声; the four tones of modern standard Chinese pronunciation, namely: First or high level tone 陰平聲|阴平声, Second or rising

四声杜鹃 四聲杜鵑 si4 sheng1 du4 juan1
(bird species of China) Indian cuckoo (Cuculus micropterus)

四圣谛 四聖諦 si4 sheng4 di4
the Four Noble Truths (Buddhism); see also 四諦|四谛 and 苦集滅道|苦集灭道

四十 四十 si4 shi2
forty; 40

四时 四時 si4 shi2
the four seasons, namely: spring 春, summer 夏, autumn 秋 and winter 冬

四十二章经 四十二章經 si4 shi2 er4 zhang1 jing1
The Sutra in Forty-two Sections Spoken by the Buddha, the first Chinese Buddhist text, translated in 67 by Kasyapa-Matanga 迦葉摩騰 and Gobharana 竺法蘭 (Dharmaraksha)

四世同堂 四世同堂 si4 shi4 tong2 tang2
Four Generations Under One Roof, novel by Lao She 老舍

四世同堂 四世同堂 si4 shi4 tong2 tang2
four generations under one roof (idiom)

四书 四書 si4 shu1
Four Books, namely: the Great Learning 大學|大学, the Doctrine of the Mean 中庸, the Analects of Confucius 論語|论语, and Mencius 孟子

四碳糖 四碳糖 si4 tan4 tang2
tetrose (CH20)4, monosaccharide with four carbon atoms

四体 四體 si4 ti3
one's four limbs; two arms and two legs

四体不勤,五谷不分 四體不勤,五穀不分 si4 ti3 bu4 qin2 - wu3 gu3 bu4 fen1
never move your four limbs, can't distinguish the five crops (idiom); living as a parasite

四通八达 四通八達 si4 tong1 ba1 da2
roads open in all directions (idiom); accessible from all sides

四头肌 四頭肌 si4 tou2 ji1
quadriceps muscle group; thigh muscles

四维 四維 si4 wei2
the four social bonds: propriety, justice, integrity and honor; see 禮義廉恥|礼义廉耻; the four directions; the four limbs (Chinese medicine); four-dimensional

四围 四圍 si4 wei2
all around; on all sides; encircled

四维空间 四維空間 si4 wei2 kong1 jian1
four dimensional space (math.)

四维时空 四維時空 si4 wei2 shi2 kong1
four dimensional space-time (in relativity)

四物汤 四物湯 si4 wu4 tang1
four-substance decoction (si wu tang), tonic formula used in Chinese medicine

四下 四下 si4 xia4
everywhere

四下里 四下裡 si4 xia4 li5
all around

四象 四象 si4 xiang4
four divisions (of the twenty-eight constellations 二十八宿 of the sky into groups of seven mansions), namely: Azure Dragon 青龍|青龙, White Tiger 白虎, Vermilion Bird 朱雀, Black Tortoise 玄武

四项基本原则 四項基本原則 si4 xiang4 ji1 ben3 yuan2 ze2
the Four Cardinal Principles by Deng Xiaoping 鄧小平|邓小平 in 1979: to uphold the socialist road, proletariat's dictatorship, CPC's leadership, and Maoism and Marxism-Leninism

四小龙 四小龍 si4 xiao3 long2
Four Asian Tigers; East Asian Tigers; Four Little Dragons (East Asian economic powers: Taiwan, South Korea, Singapore and Hong Kong)

四旬节 四旬節 si4 xun2 jie2
First Sunday of Lent

四旬斋 四旬齋 si4 xun2 zhai1
Lent (Christian period of forty days before Easter)

四眼田鸡 四眼田雞 si4 yan3 tian2 ji1
four-eyes

四仰八叉 四仰八叉 si4 yang3 ba1 cha1
sprawled out on one's back (idiom)

四叶草 四葉草 si4 ye4 cao3
four-leaf clover

四一二 四一二 si4 yi1 er4
12th April; refers to Chiang Kai-shek's coup of 12th April 1927 against the communists in Shanghai

四一二惨案 四一二慘案 si4 yi1 er4 can3 an4
the massacre of 12th Mar 1927; the Shanghai coup of 12th Mar 1927 by Chiang Kai-shek against the communists

四一二反革命政变 四一二反革命政變 si4 yi1 er4 fan3 ge2 ming4 zheng4 bian4
counterrevolutionary coup of 12th April 1927, Chiang Kai-shek's coup against the communists in Shanghai

四一二事变 四一二事變 si4 yi1 er4 shi4 bian4
the coup of 12th Mar 1927, an attempt by Chiang Kai-shek to suppress the communists; called 反革命政变|反革命政變 or 慘案|惨案 in PRC literature

四乙基铅中毒 四乙基鉛中毒 si4 yi3 ji1 qian1 zhong1 du2
tetraethyl lead poisoning

四溢 四溢 si4 yi4
(of a perfume or a foul odor) permeating the whole place; (of grease etc) dripping everywhere; flowing all over the place

四元数 四元數 si4 yuan2 shu4
quaternion (math)

四月 四月 si4 yue4
April; fourth month (of the lunar year)

四月份 四月份 si4 yue4 fen4
April

四诊 四診 si4 zhen3
(TCM) the four methods of diagnosis, namely 望診|望诊 (observation), 聞診|闻诊 (auscultation and olfaction), 問診|问诊 (interrogation), 切診|切诊 (pulse feeling and palpation)

四肢 四肢 si4 zhi1
the four limbs of the body

四周 四周 si4 zhou1
all around

四子王 四子王 si4 zi3 wang2
Siziwang banner or Dörvön-xüüxed khoshuu in Ulaanchab 烏蘭察布|乌兰察布, Inner Mongolia

四子王旗 四子王旗 si4 zi3 wang2 qi2
Siziwang banner or Dörvön-xüüxed khoshuu in Ulaanchab 烏蘭察布|乌兰察布, Inner Mongolia

宋四大书 宋四大書 song4 si4 da4 shu1
Four great compilations of Northern Song dynasty, namely: Extensive records of the Taiping era (978) 太平廣記|太平广记, Imperial readings of the Taiping era 太平御覽|太平御览, Prime tortoise of the record bureau 冊府元龜|册府元龟, Finest blossoms in the garden of literature 文苑英華

宋四家 宋四家 song4 si4 jia1
four famous Song calligraphers, namely: Su Shi 蘇軾|苏轼, Huang Tingjian 黃庭堅|黄庭坚, Mi Fu 米芾 and Cai Xiang 蔡襄

唐初四大家 唐初四大家 tang2 chu1 si4 da4 jia1
Four Great Poets of early Tang; refers to Yu Shi'nan 虞世南, Ouyang Xun 陽歐詢|欧阳询, Chu Suiliang 楮遂良 and Xue Ji 薛稷

挑三拣四 挑三揀四 tiao1 san1 jian3 si4
to be picky; to be choosy

调三窝四 調三窩四 tiao2 san1 wo1 si4
to sow the seeds of discord everywhere (idiom)

挑三窝四 挑三窩四 tiao3 san1 wo1 si4
to sow discord everywhere

头脑简单四肢发达 頭腦簡單四肢發達 tou2 nao3 jian3 dan1 si4 zhi1 fa1 da2
all brawn no brains

推三阻四 推三阻四 tui1 san1 zu3 si4
to use all sorts of excuses

危机四伏 危機四伏 wei1 ji1 si4 fu2
danger lurks on every side (idiom)

文房四宝 文房四寶 wen2 fang2 si4 bao3
Four Treasures of the Study, namely 筆|笔, 墨, 紙|纸 and 硯|砚; the essentials of calligraphy and scholarship (idiom)

五湖四海 五湖四海 wu3 hu2 si4 hai3
all parts of the country

五四 五四 wu3 si4
fourth of May, cf 五四運動|五四运动, national renewal movement that started with 4th May 1919 protest against the Treaty of Versailles

五四爱国运动 五四愛國運動 wu3 si4 ai4 guo2 yun4 dong4
May Fourth Movement; Chinese national renewal movement that started with 4th May 1919 protest against the Treaty of Versailles

五四运动 五四運動 wu3 si4 yun4 dong4
May Fourth Movement; Chinese national renewal movement that started with 4th May 1919 protest against the Treaty of Versailles

新四军 新四軍 xin1 si4 jun1
New Fourth army of Republic of China, set up in 1937 and controlled by the communists

星期四 星期四 xing1 qi1 si4
Thursday

轩辕十四 軒轅十四 xuan1 yuan2 shi2 si4
Regulus (constellation)

眼观四处,耳听八方 眼觀四處,耳聽八方 yan3 guan1 si4 chu4 - er3 ting1 ba1 fang1
see 眼觀四面,耳聽八方|眼观四面,耳听八方

眼观四面,耳听八方 眼觀四面,耳聽八方 yan3 guan1 si4 mian4 - er3 ting1 ba1 fang1
lit. the eyes observe all sides and the ears listen in all directions (idiom); fig. to be observant and alert

扬名四海 揚名四海 yang2 ming2 si4 hai3
known throughout the country (idiom); world-famous

一部二十四史,不知从何说起 一部二十四史,不知從何說起 yi1 bu4 er4 shi2 si4 shi3 - bu4 zhi1 cong2 he2 shuo1 qi3
It's a long and intricate story, I hardly know where to start.

一年四季 一年四季 yi1 nian2 si4 ji4
all year round

元曲四大家 元曲四大家 yuan2 qu3 si4 da4 jia1
Four great Yuan dramatists, namely: Guan Hanqing 關漢卿|关汉卿, Zheng Guangzu 鄭光祖|郑光祖, Ma Zhiyuan 馬致遠|马致远 and Bai Pu 白樸|白朴

杂剧四大家 雜劇四大家 za2 ju4 si4 da4 jia1
Four great Yuan dramatists, namely: Guan Hanqing 關漢卿|关汉卿, Zheng Guangzu 鄭光祖|郑光祖, Ma Zhiyuan 馬致遠|马致远 and Bai Pu 白樸|白朴

再三再四 再三再四 zai4 san1 zai4 si4
repeatedly; over and over again

再四 再四 zai4 si4
repeatedly; over and over again

张三,李四,王五,赵六 張三,李四,王五,趙六 zhang1 san1 - li3 si4 - wang2 wu3 - zhao4 liu4
four proverbial names; Tom, Dick and Harry

张三李四 張三李四 zhang1 san1 li3 si4
Zhang and Li (idiom); Zhang with tight trousers and Li with wide hat; Tom, Dick and Harry

朝三暮四 朝三暮四 zhao1 san1 mu4 si4
lit. say three in the morning but four in the evening (idiom); to change sth that is already settled upon; indecisive; to blow hot and cold

志在四方 志在四方 zhi4 zai4 si4 fang1
to aspire to travel far and make one's mark (idiom)

周四 週四 zhou1 si4
Thursday