Word
Kana: だい Romaji: dai Level: N3

Meaning in English

big, large, great

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Word context

What it means

大 means "big" or "large"; it denotes magnitude, extent, or prominence and functions as a basic semantic element in Japanese to mark things that are physically large, extensive in scope, or significant.

Main meanings

  • 1. Indicates greatness or importance beyond mere physical size, often used to describe significance or rank.
  • 2. Marks maturity or adulthood when combined with words that denote persons.
  • 3. Functions as a colloquial intensifier that amplifies emotion or preference in spoken language.
  • 4. Acts as an abbreviation or label in names and classifications to signal a major category or large scale.

How to use it

Appears in both written and spoken Japanese as a standalone symbol on signs and labels, as a morpheme in compound nouns and adjectives, and as a conversational intensifier; reading choices and grammatical behavior depend on whether it serves as a native adjective element (kun'yomi contexts) or as part of Sino-Japanese compounds (on'yomi contexts), and it is common in formal writing as well as informal speech.

Variants and close terms

  • 大きい (ookii) — big (adjective)
  • 偉大 (idai) — great, illustrious
  • 巨大 (kyodai) — gigantic, enormous
  • 小 (shou / chiisai) — small (antonym)

Composition

The character is a single pictographic kanji: its strokes depict a stylized human figure with outstretched arms (interpreted as breadth), the vertical stroke representing a body and the lateral strokes suggesting extended limbs; that visual conveys the idea of largeness or expansiveness inherent in the character.

Etymology

大 (on readings dai, tai; kun reading oo) reflects phonetic borrowing from Middle Chinese pronunciations that evolved into the Japanese on'yomi, while the native Japanese kun'yomi represents an indigenous word for largeness adapted to the character.

Origin

The character arrived in Japan with Chinese writing during the early centuries of the first millennium (around the 5th–6th centuries), becoming part of classical writing and then standard kanji usage; over time it was applied across administrative, religious and everyday vocabulary to label size, rank, and importance.

Word class

Kanji; morpheme/prefix; noun (漢字, 接頭語, 名詞)

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