loco
狂った
覚え方のコツ Memory Tip
loco はスペイン語で「狂った」を表し、英語でも主に米国のくだけた表現として使われる。人を直接形容する go loco や drive someone loco の形が典型。ただし侮蔑的に響く場合があるため、正式な場面では irrational、wild など文脈に合う語を選ぶ。
Connect loco with the Spanish adjective loco, meaning “crazy.” English borrowed it and uses it informally, especially in American speech. Common patterns such as go loco and drive someone loco make the meaning easy to retain: a person loses control or is driven to distraction. The word can sound playful when describing a wild situation, but applying it to a person may be insulting or insensitive. In neutral or formal English, choose a more precise word such as irrational, reckless, frantic, or mentally ill, depending on the intended meaning.
loco の語源・成り立ち Etymology
スペイン語「loco」（狂った）に由来。北米で家畜を中毒にさせるlocoweed（ロコ草）の名に使われ「狂った」の意味が英語に定着した。語源はラテン語「ulucus」（フクロウ＝不吉な鳥）とする説がある。
English loco was borrowed from Spanish loco, “crazy” or “mad.” In North American usage, the word was reinforced by locoweed, the name of plants that can poison grazing animals and cause disturbed behavior. The deeper origin of the Spanish word is uncertain; a proposed connection with a Latin word for “owl” is not established securely, so it is safest to remember the direct Spanish source.
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