tighten

tighten — verb

1. to pull or turn something so that it fits more closely or becomes more secure an

1.verbtransitive / intransitiveB1
Definition

to pull or turn something so that it fits more closely or becomes more secure and less likely to move or loosen; or to become more firm or fixed in this way

Example

Rin used a screwdriver to tighten the loose screws on the wooden chair.

tighten + loose screws/bolts/nuts

The rope around the tent tightened as Linh pulled it from the other side.

intransitive: rope/cable + tightens

Common collocations
  • tighten a screw
  • tighten a bolt
  • tighten a rope
  • tighten a strap
  • tighten a belt
  • tighten a knot
  • tighten your grip
  • tighten a chain
  • tighten muscles
Synonyms
  • fasten

    focuses on attaching or closing something securely, like a seatbelt or button; more specific than tighten

  • secure

    suggests making something safe from movement, often with more force or permanence

  • tense

    used mainly for muscles or body parts becoming stiff, not for objects like screws or ropes

Antonyms
  • loosen

    the direct opposite — to make something less tight or less fixed

  • slacken

    to make a rope, cable, or grip less tight; more specific than loosen

Grammar Patterns

tighten + object (screw/bolt/rope/strap/belt)

object (muscle/rope/grip) + tightens

Usage Note

This sense works both ways: you can tighten something (transitive, with a direct object) or something can tighten by itself (intransitive, no object). Common objects include screws, bolts, ropes, straps, belts, knots, chains, and grips. For body parts such as muscles or jaws, the intransitive form is more natural.

Common Mistakes

I tightened the screw too much that it broke.
I tightened the screw so much that it broke.
表示結果應用「so...that」，而非「too...that」。
The belt tightened me when I sat down.
The belt tightened around my waist when I sat down.
作不及物動詞時，主詞是變緊的物品本身，不是人。
I tightened my shoelaces too tight.
I tightened my shoelaces too much.
tighten 之後應接程度副詞（much），而非形容詞（tight）。

2. to make rules, laws, security measures, or other restrictions stronger or more s

2.verbtransitiveB2
Definition

to make rules, laws, security measures, or other restrictions stronger or more severe, so that people have less freedom or find it harder to break them

Example

The government tightened security at all international airports after the recent threat.

tighten + security / tighten + controls

Banks have tightened their lending rules, making it harder for small businesses to get loans.

tighten + rules/regulations/policies

Common collocations
  • tighten security
  • tighten rules
  • tighten restrictions
  • tighten controls
  • tighten regulations
  • tighten a policy
  • tighten the law
  • tighten standards
Synonyms
  • restrict

    more general — means to limit or control; does not imply making existing rules stronger, but creating new limits

  • stiffen

    suggests making penalties or requirements harder to meet; less common than tighten in this sense

  • clamp down on

    phrasal verb meaning to take strong action to stop something; more forceful and informal than tighten

Antonyms
  • relax

    to make rules or restrictions less severe; the most common opposite

  • ease

    to gradually reduce strictness; softer in tone than relax

  • loosen

    can be used for rules/restrictions, though less common than relax

Grammar Patterns

tighten + object (rules/security/controls/restrictions/policies)

Usage Note

The subject of this sense is usually an organization or authority (government, company, school, bank, city council). The object is always an abstract noun related to rules or restrictions — you cannot tighten a person. Frequently used with adverbs such as 'significantly,' 'further,' or 'dramatically.'

Common Mistakes

The police tightened the criminals.
The police tightened security around the building.
tighten 只能用於規則、安檢或限制等抽象事物，不能直接「收緊人」。
The government tightened the law more strictly.
The government tightened the law.
tighten 本身已包含「變得更嚴格」的意思，加上 more strictly 是贅字。
The school tightened up on their dress code.
The school tightened its dress code.' 或 'The school tightened up its dress code.
tighten up 可直接接受詞，不需加介係詞 on。
Phrasal verbs

tighten up

phrasal verb

To make something stricter, more secure, or more effective.

The school tightened up its rules on cell phone use.

We need to tighten up security after the recent theft.

Idioms

tighten your belt

idiom

To reduce spending because you have less money than before.

After losing his job, Mark had to tighten his belt.

The company is tightening its belt this year to avoid losses.

Word family

Synonym discussion

Sense: verb/1

Tighten, fasten, secure, and clench all relate to making something firmer or more fixed, but they differ in typical objects and situations. Tighten is the most general term — it covers screws, ropes, straps, and grips, and emphasizes reducing looseness. Fasten focuses on attaching or closing something, like fastening a seatbelt, a button, or a zipper. Secure suggests making something safe from movement or danger, often with more force or permanence, as in securing a boat to a dock or a child in a car seat. Clench is specific to body parts: you clench your fist, jaw, or teeth when you are tense, angry, or determined. For example: 'Adina tightened the straps on her backpack.' 'Esteban fastened his seatbelt before the car moved.' 'The sailor secured the rope to the metal post.' 'Nikhil clenched his jaw and said nothing.'

tighten ↗fasten ↗secure ↗clench

Common collocations

Nouns

Adverbs

Phrases

  • tighten one's grip on
  • tighten the screws on
  • tighten the belt

Prepositions

Etymology

Old EnglishEarly Modern EnglishEnglish

Tighten is formed from the adjective 'tight' (meaning firm, close-fitting, or not loose) combined with the suffix '-en,' which turns adjectives into verbs with the meaning 'to make or become.' The adjective 'tight' comes from Old English 'þight,' meaning strong or firm. The verb has been used in English since the early 1500s, first for physical firming and later extending to abstract senses about rules and restrictions.