fáng​bù​shèng​fáng

impossible to defend against

防不胜防 防不勝防 fáng​bù​shèng​fáng
impossible to defend against
(idiom) impossible to guard against effectively because there are too many things to watch out for; virtually impossible to prevent

Frequency

Movie subtitles
0.180 per million appears in 0% of films
Written text
1.75 per million

Sources