乘虚而入 chéng xū ér rù

exploit weakness; attack when defenses are weak

Word data

HSK Not in HSK
Frequency 29965th word

Definitions

  1. 1. to enter by exploiting a weak spot (idiom); to take advantage of a lapse

Characters

Character Meaning
乘 chéng HSK 4
to ride; to make use of; to take advantage of
虚 xū HSK 5
false; empty or unoccupied; (of health) weak
而 ér HSK 3
and; but (not); (indicates contrast)
入 rù HSK 4
to enter; to go into; to join