cheeks
Your cheeks are the sides of your face below your eyes.
Tears were running down her cheeks.
眼泪顺着她面颊流下。
You say that someone has cheek when you are annoyed or shocked at something unreasonable that they have done.
I'm amazed they had the cheek to ask in the first place.
我很吃惊,他们当初竟有脸问。