verb · to moisten or lubricate

我的嗓子有点发干，喝口温水润一下。

verb, adjective · moist, glossy, or sleek

这款口红质地很润，涂在嘴上一点也不干。

verb · to moisten or nourish something, typically referring to rain's effect on vegetation

春天的小雨润红了岸边的桃花。

verb · to polish or touch up a piece of writing to make it more elegant or smooth; short for 润色 rùn​sè

这篇文章还得再润一润。

verb · to emigrate in order to flee adverse conditions (slang loanword from "run")

他决定润到国外去生活。

verb · to embellish, polish, or enhance

初稿已经写好，你最好再找人帮着润一润。

noun · profit or remuneration

由于经营不善，那家店已经没有利润了。