Expressions (phrases, clauses, etc.), Godan verb with 'ru' ending
to bear up in tragedy; to stand pain well; to hold one's temper; to put up (with something); to clench one's teeth
Idiomatic expression
歯を食い縛る、喉元までせりあがった感情を強引に飲み込む。He grits his teeth and forces back his growing fear.
Also written 歯を食い縛る【はをくいしばる】