How to say "ignorant" in Japanese

Choosing the right word
  • 蒙昧もうまい
    na-adjective, nounCovers 'ignorant' in the sense of unenlightened or uncivilized, often written. A formal, literary choice; as a less common word it is seldom what you want for plain everyday ignorance.
  • 無学むがく
    na-adjective, no-adjective'Ignorant' as uneducated or illiterate — lacking schooling rather than lacking awareness. Fits contexts about someone with little formal education; a less common, somewhat written word.
  • 無知蒙昧むちもうまい
    na-adjective, nounA four-character idiom meaning unenlightened, uneducated and ignorant. Strong and literary; used for sweeping descriptions of ignorance rather than casual remarks about a person.
  • 迂愚うぐ
    na-adjective, nounMaps to 'ignorant' but really means stupid or foolish, with a humble, literary flavor. Rare; seldom the word you want for ordinary ignorance about facts.
  • 意識が低いいしきがひくい
    expression, i-adjective'Ignorant' as having a poor sense of something or being benighted — not very conscious of an issue. A phrase, not a single word, used for low awareness of matters like health or society.

Most of these are rare written words; for everyday 'ignorant' meaning lacking knowledge use 無学 or 「意識が低い」, while 蒙昧, 無知蒙昧 and 迂愚 lean toward unenlightened or stupid.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

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