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IELTS BNC: 4294 COCA: 4536
tighten
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 旋紧;拧紧;上紧
     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 使绷紧;拉紧
     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 变紧;绷紧
       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)(肌肉或身体某部位)变得僵硬,变得僵直,绷紧

    Her stomach tightened, anticipating the fight that was to come. 预料到即将有战斗,她的肚子绷得紧紧的。

     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 (由于生气而)(嘴巴)撅起,(双唇)紧闭
       Synonyms and related words
  4. 4
    [I] if your hand tightens, or if your fingers tighten, you hold something more tightly 紧抓;紧握
     Synonyms and related words
  5. 5
    [T] to make a set of rules stricter or harder to avoid 使(制度)更严格

    a bill that will tighten trading rules 建议制定更严格的贸易规章的议案

    tighten control :

    The government wants to tighten its control on the press. 政府想加强对新闻出版的管理。

     Synonyms and related words
    1. a.
      to make an arrangement for guarding or protecting something more effectively 加强保护

      Security at foreign consulates was tightened after the attack. 在那次袭击后,外国领事馆的安全措施加强了。

       Synonyms and related words

phrasal verbs


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