忡 忡 chong1
grieved; distressed; sad; uneasy

strokes 7
radical
心
心
strokes after radical 4
忧心忡忡 憂心忡忡 you1 xin1 chong1 chong1
deeply worried and sick at heart (idiom)

怔忡 怔忡 zheng1 chong1
(of the heart) palpitating with fear; palpitation (Chinese medicine)