匕

匕首

bǐ shǒu

dagger

图穷匕见

tú qióng bǐ xiàn

lit. the assassin's dagger, concealed in a map scroll, is suddenly revealed when the map is unrolled (referring to the attempted assassination of Ying Zheng 嬴政[Ying2 Zheng4] by Jing Ke 荊軻|荆轲[Jing1 Ke1] in 227 BC) (idiom)

图穷匕首见

tú qióng bǐ shǒu xiàn

see 圖窮匕見|图穷匕见[tu2 qiong2 bi3 xian4]