tighten up

• 动词短语，表示加强安全、严格程度或牢固程度，也指提高效率或纪律性。

A phrasal verb used to indicate the act of making something more secure, strict, or firm, or improving efficiency or discipline.

不可数 · 及物和不及物 · 短语动词，可分

1. Make more secure or firmformal

   To make something more tight, secure, or firmly fixed.

   收紧

   • He tightened up the screws on the shelf.
   • You need to tighten up the rope so it doesn't slip.
   • The mechanic tightened up the bolts on the engine.

   同义词anchorbraceclampfastenreinforcesecurestiffenstrengthentauten

   反义词loosenrelax

2. Improve or make stricterformal

   To make rules, procedures, or standards more strict or effective.

   收紧

   • The company tightened up its security policies after the breach.
   • The government plans to tighten up regulations on pollution.
   • We need to tighten up our quality control process.

   同义词reinforcestiffenstrengthentoughen

   反义词easeloosenrelax

3. Become tense or nervousinformal

   To become physically or emotionally tense, often due to stress or fear.

   紧张起来

   • He tightened up when he heard the strange noise.
   • She tends to tighten up before public speaking.
   • Don't tighten up; just relax and breathe deeply.

   同义词chokeclenchfreezestiffentense up

   反义词calmloosenrelaxunwind

基本动词tighten