Definition

1. Adjective:

   • Tightly contracted / tightly constricted: Describes something that is drawn together or squeezed tightly, reducing its size or volume, often referring to muscles or anatomical structures.
   • Closely fitting / snug: Describes an object that fits against another very closely without gaps.

2. Verb (to constrict tightly):

   • To contract tightly / to constrict tightly: The action of becoming or making something become tightly drawn together or narrowed.

Usage Examples

• Adjective:

  • Các cơ vòng co khít lại để đóng van. (The sphincter muscles are tightly contracted to close the valve.)
  • Chiếc nắp đậy co khít với miệng lọ. (The lid fits snugly on the mouth of the jar.)

• Verb:

  • Mạch máu có thể co khít khi trời lạnh. (Blood vessels can constrict tightly when it is cold.)

Advanced Usage

• Anatomical and Technical Context: Frequently used in medical, biological, or technical descriptions to denote tight constriction or a very close fit.
  • Vòng đệm cao su co khít hoàn toàn, ngăn nước rò rỉ. (The rubber gasket constricts completely, preventing water leakage.)

Variants and Related Words

• Co lại (v): to contract, to shrink.

  • Sợi dây cao su co lại khi buông ra. (The elastic band contracts when released.)

• Khít (adj): tight, close-fitting, with no gap.

  • Các mảnh ghép khít vào nhau. (The puzzle pieces fit tightly together.)

Synonyms

• Constricted: made narrower or tighter.
• Tightened: made or become tight.
• Snug: fitting closely and comfortably.

Related Terms

• Cơ co khít: constrictor muscle (anatomical term).
  • Cơ co khít họng giúp nuốt. (The pharyngeal constrictor muscle aids in swallowing.)