乘人不備 chéng rén bù bèi

DEFINITIONS

  1. to take advantage of sb in an unguarded moment (idiom)
  2. to take sb by surprise

CHARACTERS

乘 chéng
HSK 4
ride, ascend; avail oneself of; numerary adjunct for vehicles
人 rén
HSK 1
man; people; mankind; someone else
不 bù
HSK 1
no, not; un-; negative prefix
備 bèi prepare, ready, perfect