clench /klentʃ/ vt. & vi.紧握，紧紧地抓住，订牢：clench one's jaws/teeth咬紧牙关The old man clenched his fist and waved it angrily at us. 老人生气地紧握拳头并对着我们挥动。His hands clenched as he faced the enemy.他面对敌人，双手紧握。