vt.

1. 捏紧，握紧；抓紧
   The girl clenched her mother's hand.

   女孩紧紧抓住她母亲的手。

   The boy clenched his fists in anger.

   那男孩愤怒地握紧了拳头。

2. 咬紧
   She clenched her teeth.

   她将牙齿咬得格格响。

3. 敲（钉）环脚

vi.

1. 紧握；紧抓；紧咬；收紧
2. （钉等）钉牢

n.[C]

1. 紧握；紧抓；紧咬
2. 敲（钉）环脚

v.

1. (with reference to one's fist or teeth) close or press together tightly, in response to stress or anger.
2. hold tightly and firmly.
3. (of muscles or a muscular part of the body) contract sharply.

n.