clench

1.[t][i]~ (sth)（通常表示愤怒、决心或不安时）捏紧，攥紧（拳头等），咬紧（牙齿等）when youclench your hands, teeth, etc., or when theyclench , you press or squeeze them together tightly, usually showing that you are angry, determined or upset

2.[t]~ sth (in/between sth)握紧；抓牢；攥住to hold sth tightly and firmly

1.握紧(拳头);咬紧(牙关)

2.(为加固目的)敲弯(钉头);敲紧,敲牢

3.捏紧,抓牢

4.解决,确定(论据等);决定(交易等)

5.【拳】揪扭,扭住;(手)握紧;咬紧;(铆钉等)钉牢

1.钉牢;咬紧牙关;咬牙切齿

2.敲弯的钉头

3.【拳】揪扭

1.if you clench a part of your body such as your hand or your mouth, or if it clenches, you close it tightly, especially because you are angry or upset

2.to hold something very firmly, especially because you are frightened, worried, or angry