一下子

yīxiàzi
  1. in a short while
  2. all at once
  3. all of a sudden

CEDICT

Entry Composition

1 一下 yīxià
  1. (after a verb) a bit; a little (indicating brief duration, or softening the tone, or suggesting giving sth a try)
  2. all at once; suddenly
2 子 zi noun suffix, as in 椅子 yǐzi "chair"