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IELTS BNC: 4294 COCA: 4536
tighten
taɪtən ˈtaɪtən
Word forms: 3rd person singular present tense tightens, present participle tightening, past tense , past participle tightened
1 V-ERG 抓紧;攥紧 If you tighten your grip on something, or if your grip tightens, you hold the thing more firmly or securely. 抓紧;攥紧

  • Luke answered by tightening his grip on her shoulder. [VERB noun]

    卢克的回应就是把她的肩头抓得更紧了。

  • Her arms tightened about his neck in gratitude. [VERB prep.]

    她充满感激，把他的脖子搂得更紧了。

  • Stefano's grip tightened and his tone became colder. [VERB]

    斯蒂芬诺的手抓得更紧了，语气也更冷了。

SYN close, narrow, strengthen, squeeze
2 V-ERG 绷紧，拉紧(绳、链) If you tighten a rope or chain, or if it tightens, it is stretched or pulled hard until it is straight. 绷紧，拉紧(绳、链)

  • The anchorman flung his whole weight back, tightening the rope. [VERB noun]

    那个压阵队员使尽了全身力气往后拽，把绳子拉得紧紧的。

  • The cables tightened and he was lifted gradually from the deck. [VERB]

    缆绳绷紧了，他被慢慢地吊离了甲板。

SYN stretch, strain, tense, tauten
3 V-ERG (对…)严加控制;(使)加强控制 If a government or organization tightens its grip on a group of people or an activity, or if its grip tightens, it begins to have more control over it. (对…)严加控制;(使)加强控制

  • He knows he has considerable support for his plans to tighten his grip on the machinery of central government. [VERB noun]

    他清楚有相当多的人支持他对中央政府机构加强控制的计划。

  • As the regime's grip on the mainland tightened over the next few years, hundreds of thousands more people fled south. [VERB]

    随着后来几年那个政权加强对大陆的控制，又有数十万人逃往南方。

4 VERB 拧紧，旋紧(螺钉、螺丝帽等) When you tighten a screw, nut, or other device, you turn it or move it so that it is more firmly in place or holds something more firmly. 拧紧，旋紧(螺钉、螺丝帽等) [Also VERB n PREPOSITION]

  • I used my thumbnail to tighten the screw on my lamp. [VERB noun]

    我用拇指指甲把台灯上的螺钉拧紧了。

  • All the bolts were fully tightened. [VERB noun]

    所有的螺钉都拧紧了。

SYN fasten, secure, screw, fix
Tighten up means the same as tighten .tighten up 同 tighten

  • It's important to tighten up the wheels properly, otherwise they vibrate loose and fall off.

    把轮子拧紧是很重要的，否则它们会因振动松动、脱落。

5 VERB (身体局部)变僵硬，产生憋闷感，产生阻塞感 If a part of your body tightens, the muscles in it become tense and stiff, for example because you are angry or afraid. (身体局部)变僵硬，产生憋闷感，产生阻塞感

  • Sofia's throat had tightened and she couldn't speak. [VERB]

    索菲娅喉咙哽住了，说不出话来。

  • She saw his jaw tighten and his face lose its colour. [VERB]

    她看见他的下巴绷紧，脸色煞白。

SYN contract, narrow, constrict, become tight
tightening

  • ...a headache caused by tension which results in tightening of the muscles in the neck.

    由于紧张导致颈部肌肉僵硬而引起的头痛

  • ...a slight tightening of the throat.

    喉咙微微发紧

6 VERB 使(规定、政策、制度)更加严格；使更加有效 If someone in authority tightens a rule, a policy, or a system, they make it stricter or more efficient. 使(规定、政策、制度)更加严格；使更加有效 [Also VERB n PREPOSITION]

  • The United States plans to tighten the economic sanctions currently in place. [VERB noun]

    美国计划加大现有经济制裁的力度。

  • They have tightened security along the border. [VERB noun]

    他们加强了边境的安全工作。

  • Take-off and landing procedures have been tightened after two jets narrowly escaped disaster. [be VERB-ed]

    在两架喷气机差点出事故之后，起飞和降落的操作规程更加严格了。

SYN increase, heighten, toughen (up), beef up [informal]
Tighten up means the same as tighten .tighten up 同 tighten

  • Until this week, every attempt to tighten up the law had failed.

    到本周为止，一切旨在严格执法的努力都失败了。

  • He accused ministers of breaking election pledges to tighten up on immigration.

    他指责部长们没有兑现在竞选中许下的加强移民管制的诺言。

tightening

  • ...the tightening of state control over press and broadcasting.

    政府加强了对出版和广播的控制

7 to tighten your belt→see: belt  to tighten the screw→see: screw 
Phrasal verbs:
tighten up
Trends of tighten
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