General rest:
* 休息 (xiūxi) - This is the most common and general way to say "rest." It can refer to taking a break, sleeping, or simply relaxing.
Resting from work or study:
* 休息 (xiūxi) - This is the same word as above, but the context makes it clear that it refers to resting from work or study.
* 放松 (fàngsōng) - This means "relax" and can be used to express the idea of taking a break to relieve stress.
Sleep:
* 睡觉 (shuìjiào) - This means "sleep" and is the most common way to refer to resting by sleeping.
To rest (verb):
* 休息 (xiūxi) - This can also be used as a verb, meaning "to rest" or "to take a break."
Examples:
* 我要休息一下。 (Wǒ yào xiūxi yīxià.) - I need to take a break.
* 他在休息。 (Tā zài xiūxi.) - He is resting.
* 我要睡觉了。 (Wǒ yào shuìjiào le.) - I'm going to sleep now.
You can choose the best word based on the specific situation you're talking about.