one's clench on sth
表示“紧紧握住某物”，常与 on 连用，前面多用物主代词。
His clench on the rope tightened as the wind rose.
风越来越大，他握绳的手攥得更紧了。
紧握；攥紧
clenches — plural of clench
密封；密封件；（SubGenius教会的）地方分会；用于薄壁衬套的密封件；恶搞宗教“SubGenius教会”的地方分会
紧握
A tight grip.
用于薄壁衬套的密封件
A seal that is applied to formed thin-wall bushings.
恶搞宗教“SubGenius教会”的地方分会
A local chapter of the Church of the SubGenius parody religion.
Her hand tightened into a clench as she prepared for the blow.
她准备承受打击时，手紧握成拳。
用法提示：名词"clench"表示"紧握"的动作或状态，在此句中描述手部动作。
The carpenter's clench held the nail firmly in place.
木匠的钉弯头将钉子牢牢固定住。
用法提示：名词"clench"指"敲弯的钉尖"，用于固定钉子。
He released the clench of his jaw and took a deep breath.
他松开咬紧的下巴，深吸了一口气。
用法提示：名词"clench"在这里指"咬紧"的状态，描述下巴的紧张。
表示“紧紧握住某物”，常与 on 连用，前面多用物主代词。
His clench on the rope tightened as the wind rose.
风越来越大，他握绳的手攥得更紧了。
用 give + 宾语 + a + clench 表示“紧紧攥一下某物”，动作短暂。
He gave the handle a clench and pulled hard.
他紧紧攥了一下把手，然后用力一拉。
grammar · medium
易错句子The rope slipped out of his hand because his clenchs were too weak.
正确表达The rope slipped out of his hand because his clenches were too weak.
clench 作“紧握”讲时是可数名词，拼写以 -ch 结尾，复数必须加 -es，变为 clenches，不能只加 -s 写成 clenchs。
grammar · medium
易错句子He held the rope in clench so it would not slip.
正确表达He held the rope in a clench so it would not slip.
此处 clench 表示“一次紧握”，是可数名词的单数形式，前面需要用不定冠词 a。汉语名词前没有冠词，学习者容易漏掉，但英语可数名词单数不能光用介词直接带出。
针对'clench'动词义'紧握'的反义词
握紧拳头
He clenched his fist in anger.
他愤怒地握紧拳头。
咬紧牙关
She clenched her teeth to endure the pain.
她咬紧牙关忍受疼痛。
咬紧下巴
He clenched his jaw to suppress his anger.
他咬紧下巴抑制怒火。
握紧双手
She clenched her hands nervously.
她紧张地握紧双手。
咬紧牙关
He clenched his teeth and bore the pain.
他咬紧牙关，忍住了疼痛。
握紧拳头
She clenched her fist in anger.
她愤怒地握紧了拳头。
咬紧下巴
He clenched his jaw, trying to stay calm.
他咬紧下巴，试图保持冷静。
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Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY, WORDNET.