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IELTS BNC: 4294 COCA: 4536
tighten
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verb /ˈtaɪt(ə)n/
present tense
I/you/we/theytighten
he/she/ittightens
present participletightening
past tensetightened
past participletightened
present tense
I/you/we/theytighten up

or tighten up

  1. 1
    [T] to turn something such as a screw or a lid until it is tight and you cannot turn it any more 旋緊；擰緊；上緊
     Synonyms and related words
    To loosen or tighten: loosen, unwind, slacken...
  2. 2
    [T] to pull something such as a rope or a belt until it is straighter or until it fits more tightly around something 使繃緊；拉緊
     Synonyms and related words
    To loosen or tighten: loosen, unwind, slacken...
    1. a.
      [I] if something such as a rope or a chain tightens, it becomes straighter or it fits more tightly around something 變緊；繃緊
       Synonyms and related words
      To loosen or tighten: loosen, unwind, slacken...
  3. 3
    [I/T] if a muscle or a part of your body tightens, or if you tighten it, it becomes hard and stiff, often because you are angry or afraid （使）（肌肉或身體某部位）變得僵硬，變得僵直，繃緊

    Her stomach tightened, anticipating the fight that was to come. 預料到即將有戰鬥，她的肚子繃得緊緊的。

     Synonyms and related words
    Relating to muscles and tendons: cartilaginous, contract, motor...
    1. a.
      [I] if your mouth tightens, or if your lips tighten, your mouth looks narrow because you are angry or annoyed （由於生氣而）（嘴巴）撅起，（雙唇）緊閉
       Synonyms and related words
      To show, or to be expressed in the face or eyes: clear, crease, creep...
  4. 4
    [I] if your hand tightens, or if your fingers tighten, you hold something more tightly 緊抓；緊握
     Synonyms and related words
    To hold something or someone: carry, hold on, hang on...
  5. 5
    [T] to make a set of rules stricter or harder to avoid 使（制度）更嚴格

    a bill that will tighten trading rules 建議制定更嚴格的貿易規章的議案

    tighten control :

    The government wants to tighten its control on the press. 政府想加強對新聞出版的管理。

     Synonyms and related words
    To limit or control something or someone: draw a line in the sand, limit, control...
    1. a.
      to make an arrangement for guarding or protecting something more effectively 加強保護

      Security at foreign consulates was tightened after the attack. 在那次襲擊後，外國領事館的安全措施加強了。

       Synonyms and related words
      To protect or defend someone or something: protect, defend, save...

phrasal verbs

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. 這些詞均表示使變緊、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 使變緊；使更加牢固◆His mouth tightened into a thin line.他的嘴緊抿成一道細縫。◆This tool is for tightening screws.這個工具是用來擰緊螺絲的。◆She tightened her grip on his arm.她把他的手臂抓得更緊了。◆The brake cable needs tightening up.刹車線需要調緊。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 （通常表示憤怒、決心或不安時）捏緊，繃緊，咬緊◆He clenched his fists in anger.他憤怒地攥緊了拳頭。◆Through clenched teeth she told him to leave.她咬牙切齒地讓他離開。◆His fists clenched slowly until his knuckles were white.他慢慢握緊拳頭，指關節都發白了。■ tense tens [intransitive, transitive] to make your muscles tight and stiff, especially because you are not relaxed （尤指因緊張）繃緊（肌肉）；（肌肉）拉緊◆She tensed, hearing the strange noise again.再次聽到那個奇怪的聲音時，她緊張起來。◆He tensed himself, listening to see if anyone had followed him.他繃緊神經，仔細聽是否有人跟蹤自己。◆Expecting a blow, she tensed every muscle in her body.她繃緊了全身肌肉，準備接受打擊。 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 咬緊牙關；下定決心；鼓起勇氣◆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.雨開始大起來，可我們鼓起勇氣繼續進行。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尤用於顯示決心；clench your teeth更常指閉緊嘴巴，以避免因憤怒或痛苦而喊出聲，或避免因寒冷或害怕而牙齒打顫。■ 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 （因光線太強、疼痛或厭惡等）瞇起眼睛，面容扭曲◆He took a sip of the medicine and screwed up his face.他喝了一小口藥，臉扭作一團。

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