倒計時

倒计时
dàojìshí
  1. to count down
  2. countdown

CEDICT

Entry Composition

1 倒 dào
  1. to invert; to place upside down or frontside back
  2. to pour out
  3. to tip out; to dump
  4. inverted; upside down; reversed
  5. to go backward
  6. contrary to what one might expect; but; yet
2 計時 jìshí
  1. to measure time
  2. to time
  3. to reckon by time