ao1
a depression; indentation; concave; hollow

wa1
variant of 窪|洼; (used in names)

strokes 5
radical
strokes after radical 3
凹岸 凹岸 ao1 an4
concave bank

凹板 凹板 ao1 ban3
intaglio; gravure

凹版 凹版 ao1 ban3
an engraved printing plate; gravure; intaglio; material printed using gravure (e.g. postage stamps)

凹槽 凹槽 ao1 cao2
recess; notch; groove; fillister

凹雕 凹雕 ao1 diao1
to engrave; to carve into

凹洞 凹洞 ao1 dong4
cavity; pit

凹度 凹度 ao1 du4
concavity

凹痕 凹痕 ao1 hen2
dent; indentation; notch; pitting

凹进 凹進 ao1 jin4
concave; a concavity (lower than the surrounding area); a depression; hollow; dented

凹镜 凹鏡 ao1 jing4
concave mirror

凹坑 凹坑 ao1 keng1
concave depression; crater

凹面镜 凹面鏡 ao1 mian4 jing4
concave mirror

凹朴皮 凹朴皮 ao1 po4 pi2
bark of tulip tree (TCM); Cortex Liriodendri

凹入 凹入 ao1 ru4
cavity; convex opening

凹透镜 凹透鏡 ao1 tou4 jing4
concave lens

凹凸 凹凸 ao1 tu1
bumpy; uneven; slotted and tabbed joint; crenelation

凹凸不平 凹凸不平 ao1 tu1 bu4 ping2
to be bumpy; uneven

凹凸形 凹凸形 ao1 tu1 xing2
in and out shape; crenelated

凹凸轧花 凹凸軋花 ao1 tu1 ya4 hua1
embossing

凹凸印刷 凹凸印刷 ao1 tu1 yin4 shua1
embossing; die stamping

凹纹 凹紋 ao1 wen2
die (printing, metalwork etc)

凹线 凹線 ao1 xian4
groove

凹陷 凹陷 ao1 xian4
to cave in; hollow; sunken; depressed

贾平凹 賈平凹 jia3 ping2 wa1
Jia Pingwa (1952-), Chinese novelist

山凹 山凹 shan1 ao1
mountain cave, hole, recess etc

中央凹 中央凹 zhong1 yang1 ao1
fovea centralis (depression in the macula retina, most sensitive optic region)