前功盡棄 qián gōng jìn qì

DEFINITIONS

  1. to waste all one's previous efforts (idiom)
  2. all that has been achieved goes down the drain

CHARACTERS

前 qián
HSK 1
in front, forward; preceding
功 gōng
HSK 4
achievement, merit, good result
盡 jìn exhaust, use up; deplete
棄 qì reject, abandon, discard