一下儿
yī​xià​r HSK1

once

yī​xià​r once
  1. 一下 yī​xià
    once
    one time; a single stroke
  2. 儿 兒 r particleaffix
    [erhua suffix]
    A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.

yī​xià​r a bit
  1. 一下 yī​xià particleverb
    [briefly]
    Used after a verb to show that an action is brief, casual, or being tried out for the first time. It often softens the tone of a request or command.
  2. 儿 兒 r particleaffix
    [erhua suffix]
    A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.

yī​xià​r suddenly
  1. 一下 yī​xià
    all at once
    all of a sudden; all at once; used to describe an action happening very quickly or abruptly
  2. 儿 兒 r particleaffix
    [erhua suffix]
    A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.