(with reference to the fingers or hand) close into a tight ball, especially when feeling extreme anger
（手，手指）紧握成拳（尤以表示愤怒）
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[with obj.]
she clenched her fists, struggling for control 她紧握双拳，努力控制情绪
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[no obj.]
Ian's right hand clenched into a fist 伊恩右手紧握成拳
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[as adj.
clenched ]he struck the wall with his clenched fist .他用握紧的拳头击打墙壁。
(with reference to the teeth)press or be pressed tightly together, especially with anger or determination or so as to suppress a strong emotion
（牙）（尤指愤怒，下定决心、压抑感情时）紧咬
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[no obj.]
her teeth clenched in anger .她气得紧咬牙关。
[with obj.]grasp (something) tightly and firmly, especially with the hands or between the teeth
握紧；咬紧
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he clenched the steering wheel so hard that the car wobbled .他把方向盘握得太紧，车子都摇摇晃晃的了。
[no obj.](of a muscular part of the body)tighten or contract sharply, especially with strong emotion
（肌肉）（尤指因强烈感情）绷紧；缩紧
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Mark felt his stomach clench in alarm .马克感到他的胃部因恐慌而缩成一团。
a contraction or tightening of part of the body
（身体部位的）紧缩；紧绷
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she saw the anger rise, saw the clench of his fists .她看到他怒气升腾，双拳紧握。
the state of being tightly closed or contracted
抓牢，握牢，包牢；缩紧。
"Old English （in the sense of