five-year-old

Thân thiện

A five-year-old child builds a tall tower with colorful wooden blocks.

Definition

1. Adjective: Being five years of age; having lived for five years.

Usage

• This adjective is used to describe the age of a person, animal, or sometimes an entity like an organization or a tree. It is typically placed before a noun.
• It is a compound adjective formed by combining a number ("five"), a unit of time ("year"), and the adjective "old". It is hyphenated when used before a noun.

Examples

• Adjective:
  • The five-year-old child started kindergarten.
  • We adopted a five-year-old dog from the shelter.
  • This is a five-year-old company, but it's already very successful.

Advanced Usage

• When used predicatively (after a linking verb like "is"), the hyphens are often omitted.
  • The child is five years old.
  • The dog is five years old.
• It can function informally as a noun to refer to a person or animal of that age.
  • The five-year-old was very excited for her birthday. (Here, "five-year-old" acts as a noun phrase meaning "a child who is five years old".)

Variants and Related Words

• Five-year-olds (plural noun): Refers to multiple children or animals of that age.
  • The class is full of energetic five-year-olds.
• Similar compound adjectives can be formed with other numbers: , , .
  • They live in a one-hundred-year-old house.

Synonyms

• Aged five: (More formal) Having reached the age of five.
• Five years of age: (Formal description)

Học thuật

Adjective

1. five years of age