thoughtless; reckless; indiscriminate
Describes acting without careful thought, often leading to negative consequences. Used as a na-adjective or noun.
You shouldn't trust people indiscriminately.
His reckless behavior caused problems.
na-adjective, adverb taking the 'to' particle, noun
excessive; unreasonable; immoderate
Often used adverbially as むやみに or むやみと to mean doing something to an unreasonable degree or without good reason.
Stop spending money excessively.
Don't shout unreasonably loud.
It's dangerous to take medicine indiscriminately.
Reckless behavior will lead to regret later.
He forces his opinions on others without any good reason.
This room is excessively large for no good reason.
やたら is a casual, spoken-style word for 'indiscriminately/excessively', while むやみ carries a stronger sense of acting without proper thought or reason and can sound more formal.
無茶 describes something unreasonable or beyond sensible limits (even physically impossible), while むやみ focuses on the lack of careful thought or moderation behind an action.
みだり is a more formal/legal word for acting without proper authorization or reason, often in phrases like みだりに立ち入るべからず, whereas むやみ is broader and more common in everyday speech.
軽率 specifically means 'rash/careless in judgment' and describes a person's poor decision-making, while むやみ more generally describes reckless or excessive action itself.
不用意 means 'careless/unprepared', emphasizing a lack of caution or readiness, whereas むやみ emphasizes acting without reason or restraint.
無闇 describes doing something excessively or thoughtlessly without regard for consequences, while 闇雲 emphasizes the absence of a clear direction or plan.
Usually written in kana; the kanji forms 無闇 and 無暗 are ateji and rare.
Ateji spelling; rarely used.
Ateji spelling; rarely used.
The origin is uncertain. The kanji 無闇 and 無暗 are ateji, combining 無 (without) with characters for darkness, suggesting 'without clarity or reason'.