投井下石

to throw stones at sb who has fallen down a well (idiom) / to hit a person when he's down

to cast / to send / to throw oneself (into the river etc) / to seek refuge / to place oneself into the hands of

a well / CL:口[kou3] / neat / orderly

underground / in the pit (mining)

down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action

surname Shi / abbr. for Shijiazhuang 石家莊|石家庄[Shi2 jia1 zhuang1]

dry measure for grain equal to ten dou 斗 / ten pecks / one hundred liters

rock / stone / stone inscription / one of the eight categories of ancient musical instruments 八音[ba1 yin1]

dry measure for grain equal to ten dou 斗[dou3]; one hundred liters / ancient pr. [shi2]