Subject + 辛苦 / 辛苦 + 的 + Noun
The word 辛苦 (xīnkǔ) means "to work hard," "hardship," or "toilsome." It can function as both a verb and an adjective, describing laborious effort or difficult conditions. For example, 皆辛苦 means "all involves hard work," and 你辛苦了 is a common way to acknowledge someone's effort.
这几天加班太辛苦了,好好休息一下吧。
Zhè jǐ tiān jiābān tài xīnkǔ le, hǎohǎo xiūxi yīxià ba.
You've been working overtime so hard these past few days — get some good rest.
种地是非常辛苦的工作。
Zhòngdì shì fēicháng xīnkǔ de gōngzuò.
Farming is very hard work.
谢谢你帮忙搬家,你辛苦了!
Xièxie nǐ bāngmáng bānjiā, nǐ xīnkǔ le!
Thank you for helping me move — you've worked so hard!