牙关 yáguān jaw Origin Definitions Defs Strokes Stroke Words Sentences Sents 咬紧牙关 yǎojǐnyáguān endure to endure pain, suffering, or hardship with determination; to bite the bullet牙关紧闭症 yáguānjǐnbìzhèng lockjaw A medical condition, often associated with tetanus, characterized by a spasm of the jaw muscles that keeps the mouth tightly closed.