坐下来 + 休息
休息 (xiūxi) means "to rest" or "to take a break" and is used as a verb or noun. It describes the act of pausing from activity to recover energy, and is commonly used in daily life for both short breaks and longer periods of rest.
你工作太辛苦了,周末好好休息一下吧。
Nǐ gōngzuò tài xīnkǔ le, zhōumò hǎohǎo xiūxi yīxià ba.
You've been working too hard; get some good rest this weekend.
中午休息的时候我喜欢出去散散步。
Zhōngwǔ xiūxi de shíhou wǒ xǐhuan chūqù sàn sàn bù.
During the lunch break, I like to go out for a walk.
医生说他需要在家休息两个星期。
Yīshēng shuō tā xūyào zài jiā xiūxi liǎng gè xīngqī.
The doctor said he needs to rest at home for two weeks.