一下

(used after a verb) give it a go / to do (sth for a bit to give it a try) / one time / once / in a while / all of a sudden / all at once

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action

in a short while / all at once / all of a sudden

to wait a moment / later / in awhile

erhua variant of 等一下[deng3 yi1 xia4]

erhua variant of 一下[yi1 xia4]