- 咬紧牙关 yǎojǐnyáguān to grit one's teethto grit one's teeth tightly; to endure pain or hardship doggedly; to bite the bullet; to show firm determination in the face of difficulty
- 咬定牙关 yǎodìngyáguān to grit one's teethto grit one's teeth; to endure hardship with determination; to remain resolute in the face of difficulty
- 牙关紧闭 yáguānjǐnbì trismusDifficulty opening the mouth, such as lockjaw, caused by inflammation or spasms of the jaw muscles and surrounding tissues
- 牙关紧闭症 yáguānjǐnbìzhèng lockjawlockjaw; trismus