一下子
yī​xià​zi HSK5

all at once

yī​xià​zi all at once
  1. 一 yī adverbnumeral
    [suddenness]
    Used before a verb to indicate that an action or situation occurs suddenly or unexpectedly.
  2. 下 xià measure wordparticle
    times
    measure word for the frequency of an action or a brief stroke of effort
  3. 子 zi numeraladverb
    measure word suffix
    [suffix] used after certain measure words to indicate a brief duration or a single instance

yī​xià​zi once
  1. 一 yī numeral
    one
    one; the number 1; single; alone
  2. 下 xià measure wordparticle
    times
    measure word for the frequency of an action or a brief stroke of effort
  3. 子 zi numeraladverb
    measure word suffix
    [suffix] used after certain measure words to indicate a brief duration or a single instance

yī​xià​zi [brief action]
  1. 一 yī numeralparticle
    [brief action]
    Used between a repeated verb to show that the action is brief, casual, or an attempt.
  2. 下 xià measure wordparticle
    times
    measure word for the frequency of an action or a brief stroke of effort
  3. 子 zi numeraladverb
    measure word suffix
    [suffix] used after certain measure words to indicate a brief duration or a single instance