4

Thân thiện

Definition

1. Noun:

   • The cardinal number that is the sum of three and one: The natural number following 3 and preceding 5. It is represented by the symbol "4" or the word "four".

2. Adjective:

   • Being one more than three: A quantity or amount totaling exactly this number.

Examples of Usage

• Noun:

  • The number 4 is considered unlucky in some cultures.
  • Divide the total by four to get the average.
  • A square has four sides.

• Adjective:

  • She has four brothers.
  • Please turn to page four.
  • The meeting starts at four o'clock.

Advanced Usage

• "On all fours": On hands and knees.
  • The baby crawled on all fours.
• "Four-letter word": A short word, often considered vulgar or offensive.
  • He shouted a four-letter word in frustration.
• "Four-eyes" (informal, potentially offensive): A nickname for someone who wears glasses.
  • The bully called him four-eyes.

Variants and Related Words

• Fourth (adjective & noun): Constituting number four in a sequence; the item in position four.
  • This is my fourth cup of coffee today.
  • She finished in fourth place.
• Fourfold (adjective & adverb): Four times as great or as numerous; consisting of four parts.
  • There was a fourfold increase in sales.
• Quad- (prefix): A combining form meaning "four".
  • quadrilateral, quadruple

Synonyms

• Quartet: A group of four people or things.
• Quadruple: Consisting of four parts or things; to multiply by four.
• Tetrad (technical): A group or set of four.

Related Phrases

• The four corners of the earth/world: Every part of the world.
  • People came from the four corners of the earth to see it.
• Four-square (adjective/adverb): Firm and resolute; squarely.
  • He stood four-square against the proposal.
• Four-poster (bed): A bed with a tall post at each corner supporting a canopy.

Related Idioms

• Between you, me, and the four walls: In strict confidence.
  • Between you, me, and the four walls, I think the plan will fail.
• Four sheets to the wind (informal): Very drunk.
  • After the party, he was four sheets to the wind.

Học thuật

Adjective

1. being one more than three

Noun

1. the cardinal number that is the sum of three and one

Từ đồng nghĩa

• four
• iv