咬紧牙关

咬紧牙关:

Literally means:

clench one's' teeth

Actually means:

endure with dogged will

牙关 refers to the joint that enables one's mouth to open and close.

This phrase figuratively means one makes greatest efforts to endure pain or to overcome difficulties. It implies a strong will to persevere. Commendatory.

牙关，使嘴巴张开或闭合的关节。

咬紧牙关，形容尽最大努力忍受痛苦或克服困难。含有一定坚持下去的意思。具有褒义色彩。