1moist; glossy; sleek
2to moisten; to lubricate
3to embellish; to enhance
4profit; remuneration
5(neologism c. 2021) (slang) (loanword from "run") to emigrate (in order to flee adverse conditions)
Examples
rùn润huá滑xì tǒng系统shè jì设计de得bù不hǎo好。
润滑系统设计得不好。
The lubrication system was poorly designed.
从那时开始他就只是尝一尝他的食物，也仅仅只是用饮料润湿了嘴唇而已。
From that day forth he merely tasted his food, and only just moistened his lips with drink.
我加上一些最后的润饰。
I add a few finishing touches.