間抜け|まぬけmanuke[0]heiban (flat)

1. na-adjective, nounstupid; foolish; idiotic; inane
2. nounfool; idiot; blockhead; half-wit
   あいつはクラスでいちばんのまぬけだ。↗

   He is the dumbest kid in the class.

• SynonymアホCasualColloquial insult for a fool, especially common in Kansai; can be affectionate teasing or a direct insult. 「間抜け」 instead stresses a careless slip at a key moment.
• SynonymばかCasualThe most general way to call someone stupid; also covers absurd or pointless things. 「間抜け」 focuses on missing a crucial step through carelessness and looking silly.
• Synonym愚かおろかWrittenWritten-leaning word for foolish, ill-considered thinking, as in 「愚かな考え」; it usually reads less like a direct insult. 「間抜け」 is mostly spoken mockery.
• Synonym愚ぐWrittenWritten word for folly, seen in set phrases like 「愚の骨頂」, and also a humble way to say 'I'. Rare alone; in daily speech say 「バカ」.
• Synonym白痴はくちWrittenFormer medical term for severe intellectual disability; now strongly offensive, so avoid it. To call someone stupid, use 「バカ」.
• SynonymのろまCasualColloquial word for a slow, dull person who is not quick-witted; the emphasis is on sluggishness. 「間抜け」 stresses a lapse at a key moment.
• Synonym愚鈍ぐどんWrittenWritten word for dim-witted dullness and slow reactions, often describing a person's character. 「間抜け」 instead targets a lapse at a crucial point in what one does.
• Synonym愚昧ぐまいWrittenWritten word for ignorance of reason or sense, describing a person's lack of understanding; rare. Unlike 「間抜け」, it is not about careless blunders.
• Synonym低能ていのうCasualMeans low intelligence; now mostly a derogatory slur with discriminatory overtones, so avoid it. 「間抜け」 merely calls someone careless and silly.
• Synonym痴愚ちぐWrittenWritten word for stupidity, once also a clinical grade of intellectual disability; virtually unused today. In everyday speech say 「バカ」.
• RelatedとんまCasualColloquial word for a dim person who bungles things, with a comic flavor; the closest to 「間抜け」, though much less used.
• RelatedうすのろCasualColloquial and contemptuous word for someone slow of mind and slow to understand. 「間抜け」 stresses carelessly missing the crucial point.
• RelatedおたんこなすCasualColloquial insult for a fool, teasing in tone and rather old-fashioned. Today people say 「バカ」.
• RelatedおたんちんCasualColloquial insult synonymous with 「おたんこなす」; can also mean an unpleasant character. Old-fashioned and rarely used today.
• Related愚劣ぐれつWrittenWritten word for something foolish and worthless, judging acts or remarks as in 「愚劣な行為」, or condemning a person; harsher than 「間抜け」.
• RelatedうすばかCasualColloquial, contemptuous word for someone a bit dim, not too bright. More directly about low intelligence than 「間抜け」.
• RelatedあんぽんたんCasualColloquial, teasing insult for a fool; rarely used. In daily speech say 「バカ」 or 「間抜け」.
• Related表六玉ひょうろくだまCasualColloquial insult for a muddle-headed person who cannot judge things; rare today. In everyday speech say 「間抜け」 or 「バカ」.
• Related遅鈍ちどんWrittenWritten word for slow movements and reactions; the point is slowness. 「間抜け」 is about careless lapses, not speed.
• Related痴鈍ちどんWrittenWritten word for someone both dull-witted and slow-moving; rarely used. For clumsy slowness in daily speech, say 「のろま」.
• Antonym利口りこうNeutralAntonym: clever and bright, also well-behaved of children and pets; the opposite of 「間抜け」's muddled lack of sense.
• Antonym賢いかしこいNeutralAntonym: intelligent and sensible, also shrewd at getting along in the world; opposed to 「間抜け」's foolish carelessness.

「バカ」 is the everyday default for calling someone stupid, with 「アホ」 common in Kansai. Use 「間抜け」 for a careless slip or blunder at a crucial point, as in 「間抜けな失敗」; in writing, 「愚か」. 「のろま」 and 「頓馬」 target slow, bumbling people; 「薄馬鹿」 and 「薄鈍」 are contemptuous about dimness; 「おたんこなす」「おたんちん」「安本丹」「表六玉」 are old-fashioned teasing insults. 「愚鈍」「愚昧」「愚」「愚劣」「遅鈍」「痴鈍」「痴愚」 are written or archaic. Avoid 「白痴」 and 「低能」 as discriminatory; antonyms are 「利口」 and 「賢い」.

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

1. 何なんかを行おこなったときに、大事だいじなところが足たりず、完成かんせいしていない状態じょうたい、及および、そういうことをする人ひと。注意力ちゅういりょくが足たりない人ひと。余計よけいなことをして害がいを与あたえる場合ばあいにも用もちいる。