clench

咬紧、紧闭

He clenched his teeth and tried not to cry out in pain.

他咬紧牙关，努力不因疼痛而叫出声。

握紧、紧握成拳

She clenched her fists and waited for the bad news.

她握紧拳头，等著坏消息传来。

紧抓、紧夹

The old man clenched a cigarette between his lips the whole time.

那位老先生一直用嘴唇紧紧夹著一根烟。

紧缩、收紧、揪紧

My stomach clenched the moment I heard his voice.

一听到他的声音，我的胃就揪了起来。

紧握、紧咬

There was an angry clench in his jaw as he listened.

他听著的时候，下颚因为生气而紧紧咬著。