clench

He clenched his teeth and continued to look straight ahead.他咬紧牙关，一动不动地看着前方。

He clenched his fists in anger.他愤怒地攥紧了双拳。

She was angry and spoke quietly through clenched teeth.她气得咬牙切齿地低声说着。

His jaw/fists clenched and unclenched as he listened to the speech.他听演讲时牙关咬紧了又松开/拳头握紧了又松开。

She danced alone, with a rose clenched in her teeth.她嘴里叼着一支玫瑰独自跳舞。

He was clenching a cigarette in his teeth.他嘴里叼着一支烟。