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IELTS BNC: 4294 COCA: 4536
tightenverb [ I or T ]uk/ˈtaɪ.tən/ us/ˈtaɪ.tən/

B2 to become tighter or to make something become tighter, firmer, or less easy to move（使）变紧，（使）紧固

Tighten the straps so they don't rub.把带子拉紧，这样它们就不会相互磨擦了。
As he struggled, the ropes tightened even more.他越挣扎绳子就勒得越紧。

More examples

Carefully tighten the clamp until it firmly supports the pipette in a vertical position.

I tightened the knots and prepared to descend.

If we tighten the rope, it might reach across.

The dry atmosphere tightens my skin.

Idiom(s)

tighten your belt
tighten the net

Phrasal verb(s)

tighten sth up
tighten (sth) up
IELTS BNC: 4294 COCA: 4536
tighten

verb

ADVERB | VERB + TIGHTEN | PREPOSITION ADVERB➤a little, slightly, etc.使稍微變緊；使稍緊一些➤considerably大幅收緊▸➤gradually, slowly逐步／慢慢變緊▸➤suddenly突然變緊▸➤instinctively, involuntarily, unconsciously本能地／不由自主地／無意識地收緊◇Her fingers tightened unconsciously with every jolt she received.她每受一次顛簸，她的手指都會無意識地並攏。➤painfully緊得令人痛苦▸➤up使更牢固◇Can you tighten up the bolts for me?你能幫我緊緊螺栓嗎？VERB + TIGHTEN➤seem to好像變緊▸➤feel sth感到⋯變緊◇He felt his stomach tighten.他感到肚子發緊。➤make sth使⋯變緊◇His words made her throat tighten.他的話使她喉嚨發緊。PREPOSITION➤about, around, round (especially BrE) 緊繞着⋯◇His hand tightened painfully around her wrist.他的手緊緊握住她的手腕，弄得她生疼。➤on抓緊⋯◇Her grip seemed to tighten on the door handle.她似乎把門把手抓得更緊了。➤in因⋯變緊◇He saw his father's jaw tighten in irritation.他看到父親氣得緊咬牙關。➤into緊閉成⋯◇His mouth tightened into a thin hard line.他的嘴緊繃成一道細縫。➤with因為⋯變緊◇Her face tightened with pain.她痛得緊繃着臉。
IELTS BNC: 4294 COCA: 4536
tighten verb
⇨ tighten (tighten your grip) ⇨ tighten your belt ⇨ save 2 tighten

verb

tighten ♦︎ clench ♦︎ tense ♦︎ grit your teeth ♦︎ screw your eyes/face upThese words all mean to make sth become tight or tighter. 这些词均表示使变紧、使更加牢固。PATTERNS AND COLLOCATIONS 句型和搭配◆to tighten / clench / tense / grit your teeth / screw your eyes up with / in pain, irritation, etc.◆to tighten / clench your hand / fist / jaw◆to tighten / tense your muscles◆to clench / grit your teeth◆your jaw / hand tightens / clenches / tenses◆your fist / stomach tightens / clenches◆your muscles tighten / tense◆to tighten / clench / tense (sth) involuntarily◆to clench / grit your teeth / screw your eyes up tight / tightly■ tighten [intransitive, transitive] to become or make sth tight or tighter 使变紧；使更加牢固◆His mouth tightened into a thin line.他的嘴紧抿成一道细缝。◆This tool is for tightening screws.这个工具是用来拧紧螺丝的。◆She tightened her grip on his arm.她把他的手臂抓得更紧了。◆The brake cable needs tightening up.刹车线需要调紧。OPP relax , loosen , slacken ⇨ relax 2 ■ clench [transitive, intransitive] to press your hands, teeth or stomach muscles together tightly, usually showing that you are angry, determined or upset; (of hands, teeth or stomach muscles) to be pressed together tightly in this way （通常表示愤怒、决心或不安时）捏紧，绷紧，咬紧◆He clenched his fists in anger.他愤怒地攥紧了拳头。◆Through clenched teeth she told him to leave.她咬牙切齿地让他离开。◆His fists clenched slowly until his knuckles were white.他慢慢握紧拳头，指关节都发白了。■ tense tens [intransitive, transitive] to make your muscles tight and stiff, especially because you are not relaxed （尤指因紧张）绷紧（肌肉）；（肌肉）拉紧◆She tensed, hearing the strange noise again.再次听到那个奇怪的声音时，她紧张起来。◆He tensed himself, listening to see if anyone had followed him.他绷紧神经，仔细听是否有人跟踪自己。◆Expecting a blow, she tensed every muscle in her body.她绷紧了全身肌肉，准备接受打击。 OPP relax ⇨ relax 2   see also tense ⇨ tense adj. ■ grit your ˈteeth

idiom

(-tt-)to bite your teeth tightly together; to be determined to continue to do sth in a difficult or unpleasant situation 咬紧牙关；下定决心；鼓起勇气◆She gritted her teeth against the pain.她咬牙忍痛。◆It started to rain harder, but we gritted our teeth and carried on.雨开始大起来，可我们鼓起勇气继续进行。NOTE 辨析 Grit your teeth or clench your teeth? Grit your teeth is used especially to talk about showing determination; clench your teeth is used more often to talk about keeping your mouth tightly shut in order to avoid making a noise such as shouting with anger or pain, or in order to stop your teeth from knocking together because you are cold or frightened. * grit your teeth尤用于显示决心；clench your teeth更常指闭紧嘴巴，以避免因愤怒或痛苦而喊出声，或避免因寒冷或害怕而牙齿打颤。■ ˌscrew your ˈeyes up■ ˌscrew your ˈface up

idiom

to tighten the muscles of your eyes or face, for example because the light is too strong, you are in pain or you don't like the taste or look of sth （因光线太强、疼痛或厌恶等）瞇起眼睛，面容扭曲◆He took a sip of the medicine and screwed up his face.他喝了一小口药，脸扭作一团。
IELTS BNC: 4294 COCA: 4536

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