jackass
ろば / ばか者
覚え方のコツ Memory Tip
jack は雄を表す呼び名、ass は「ロバ」で、もとは雄ロバを指す語。そこから人を「ばか者」と呼ぶ強い侮辱語になった。動物の話なら donkey に近いが、人に使う場合は rude、stupid な振る舞いを非難する語なので、冗談でも相手や場面を慎重に選ぶ。
Break jackass into jack and ass. Jack was traditionally used as a name for a male animal, while ass is an older word for a donkey, so the literal meaning is a male donkey. The word later became an insult for a person whose behavior seems very foolish, rude, or irritating. Let context decide the sense: a farm or animal description may be literal, but “Don’t be a jackass” is plainly insulting. Because the personal sense is stronger and less polite than fool, avoid using it casually in formal or respectful conversation.
jackass の類義語・関連語
jackass の語源・成り立ち Etymology
jack（雄ロバの通称、人名Jackから）+ ass（古英語 assa、ラテン語 asinus「ロバ」から）。雄ロバを指し、転じて「愚か者」の意味に。関連語: donkey, asinine（愚かな）。ロバが頑固な動物とされたことから侮蔑語に発展した。
Jackass combines jack, a traditional term or familiar name used for a male animal, with ass, the old word for a donkey. Ass entered Old English as assa and ultimately reflects Latin asinus. The compound first denoted a male donkey. It later developed a figurative use for a foolish or objectionable person, influenced by unfavorable cultural stereotypes about donkeys as stubborn or unintelligent animals.
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