食い緊る

くいしばる【食い緊る】

clench [clamp, gnash, grind, grit, set] 《one's teeth》; compress 《one's lips》.

●彼は歯を食いしばって痛みに堪えた. He bore the pain with clenched teeth.

・練習はきつかったが, みんな歯を食いしばってがんばった. Practice was tough, but they grit their teeth and kept at it.