坐 (zuò)
This is a verb meaning "to sit." It can be used in many contexts, such as:
* 请坐 (qǐng zuò): Please sit down.
* 他坐在椅子上 (tā zuò zài yǐzi shàng): He is sitting on the chair.
* 我坐在这里 (wǒ zuò zài zhè lǐ): I am sitting here.
There are also other words that can be used to describe sitting, depending on the context, such as:
* 蹲 (dūn): To squat
* 趴 (pā): To lie on one's stomach
* 跪 (guì): To kneel
However, "坐" is the most common and general word for "sit" in Chinese.