How to say "reckless" in Japanese

Choosing the right word
  • 無謀むぼうCommon
    na-adjective, nounCovers the core sense of reckless as rash and foolhardy: planning or acting with no thought for danger or consequences. Typical of daring attempts, plans, or challenges that others call ill-advised.
  • 滅多めったCommon
    na-adjectiveCovers reckless in the sense of thoughtless or careless behavior, but it is seldom the word you want for recklessness itself; its force is closer to careless or rash.
  • 大それただいそれたCommon
    pre-noun adjectivalReally means outrageous or wildly ambitious rather than reckless: it fits audacious ideas, ambitions, or schemes that overstep the bounds. Seldom the word for ordinary recklessness.
  • めちゃくちゃJLPT N2approx.Common
    na-adjective, nounCovers reckless in the sense of extreme, senseless, or wanton — acting in a wildly disordered way. Usually written in kana, and it often carries a broader nuance of chaos or absurdity.
  • 荒いあらいJLPT N2approx.Common
    i-adjectiveCovers reckless as immoderate or extravagant: a rough, unrestrained quality in manner or behavior. It suggests excess or lack of restraint rather than a rash, foolhardy decision.

Use 無謀 for rash, foolhardy plans or actions; 滅多 shades toward thoughtless carelessness; 「めちゃくちゃ」 toward senseless, wanton disorder; 「荒い」 toward immoderate, unrestrained behavior; and 「大それた」 is really for outrageous, wildly ambitious ideas.

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

Japanese equivalents
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JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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