咬緊牙關 [ㄧㄠˇ ㄐㄧㄣˇ ㄧㄚˊ ㄍㄨㄢ; yao3 jin3 ya2 guan1] lit. to bite the teeth tightly (idiom); fig. to grit one's teeth and bear the pain to bite the bullet ◄ ►