This is the 6445th most frequent Chinese word.
掩
"掩" means "to cover," "to hide," or "to conceal."
In this sentence, '掩' is used in the phrase '掩住嘴巴' which means 'cover the mouth'. It conveys the act of covering or concealing something.
她用手掩住嘴巴，笑了起来。
She covered her mouth with her hand and started laughing.
Here, '掩' is used in '掩好', indicating the action of closing or covering something, specifically referring to the door not being fully shut.
门没有掩好，风把它吹开了。
The door was not properly closed, and the wind blew it open.
In this case, '掩' appears in '掩饰', meaning 'to conceal or cover', suggesting an attempt to hide feelings or internal states.