あほ・阿呆・阿房aho

1. noun, na-adjectivefool; idiot; simpleton
   マルチするなアホ。↗

   Don't multi-post, idiot.

• SynonymばかNeutralThe standard insult in eastern Japan; 「阿呆」 is the Kansai equivalent, and how harsh either sounds depends on the relationship between the speakers.
• Synonym間抜けまぬけCasualColloquial, for someone lacking sense or careless; 「阿呆」 leans more toward plain stupidity.
• Synonym愚かおろかWrittenWritten/formal word meaning foolish; 「阿呆」 is a colloquial insult.
• Synonym愚ぐWrittenWritten single character for folly, as in 「愚の骨頂」 (the height of folly); it also serves as a humble word for I. 「阿呆」 is colloquial.
• SynonymのろまCasualColloquial, for someone slow-moving and not quick-witted; 「阿呆」 leans more toward stupidity.
• Synonym白痴はくちWrittenWritten/formal; an old medical term, now considered discriminatory; 「阿呆」 is a colloquial insult.
• SynonymとんまCasualColloquial word for a dull, slow-witted person; 「阿呆」 is the more common choice.
• Synonym愚鈍ぐどんWrittenWritten/formal, for dullness and slowness of mind; 「阿呆」 is colloquial.
• Synonym愚人ぐじんWrittenWritten/formal word for a foolish person; 「阿呆」 is a colloquial insult.
• Synonym痴人ちじんWrittenWritten/formal, as in 「痴人の夢」; 「阿呆」 is colloquial.
• Synonym愚者ぐしゃWrittenWritten/formal word for a fool; also the Tarot card The Fool; 「阿呆」 is colloquial.
• Synonym痴れ者しれものCasualColloquial but old-fashioned, for a fool or a rough type; 「阿呆」 is more common.
• Synonym愚か者おろかものNeutralA foolish person; somewhat formal, while 「阿呆」 is Kansai colloquial speech.
• Synonym愚物ぐぶつWrittenWritten/formal word for a fool; 「阿呆」 is colloquial.
• Synonym大愚たいぐWrittenWritten/formal for great folly or as a humble self-reference — the monk Ryōkan styled himself 「大愚」; 「阿呆」 is an insult.
• Synonym下愚かぐWrittenWritten/formal for extreme stupidity, or a humble self-reference; 「阿呆」 is colloquial.
• Related愚昧ぐまいWrittenWritten/formal, for ignorance — failing to grasp what is reasonable; 「阿呆」 is colloquial.
• Related愚蒙ぐもうWrittenWritten/formal, meaning ignorant and unenlightened; not used in daily life — say 「馬鹿」 or 「阿呆」.
• Related痴愚ちぐWrittenWritten/formal for stupidity; once an old medical term, now rarely used; 「阿呆」 is colloquial.
• RelatedうすのろCasualColloquial, for a half-wit who is slow to catch on; 「阿呆」 is more common.
• RelatedおたんこなすCasualColloquial insult with a comic flavor; 「阿呆」 is more common.
• RelatedおたんちんCasualColloquial and comical, for a silly fool; 「阿呆」 is more common.
• Relatedうつけ者うつけものCasualColloquial but old-fashioned, for a muddle-headed fool — Oda Nobunaga was dubbed 「大うつけ」; 「阿呆」 is more common.
• RelatedあんぽんたんCasualColloquial, comical word for a fool; 「阿呆」 is more common.
• RelatedうすばかCasualColloquial, for someone a bit silly; 「阿呆」 is more direct.
• Antonym賢者けんじゃWrittenWritten/formal word for a sage; the opposite of 「阿呆」.
• Antonym利口りこうNeutralClever and bright, also well-behaved; the opposite of 「阿呆」.

「阿呆」 is the everyday Kansai way to call someone a fool — it can be affectionate or a real insult depending on the situation. In eastern Japan people say 「馬鹿」. Use 「間抜け」 for someone lacking sense and 「のろま」 for someone slow; in writing, 「愚か者」 fits better. Most 愚-words are literary, and 「白痴」 is now discriminatory.

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

1. 「あほう」の音おとのゆれ。愚おろかなこと、愚おろかな人ひと。
2. 愚おろかなさま。