How to say "useless" in Japanese
- na-adjective, nounThe broadest way to say it: something is no good, not serving its purpose, or broken. Fits machines, plans, or attempts that fail, and also works as a plain exclamation that something won't do.
- 無用むようna-adjective, nounIt can mean 'useless; futile', but in many contexts it means 'unnecessary; not needed' instead, so it is often not the word you want for 'useless'. Weigh the sense before choosing it.
- 無益むえきna-adjective, no-adjectiveUseless in the 'futile, vain' sense: efforts, struggles, or actions that bring no benefit or profit. Often the closest English is 'futile' or 'in vain' rather than 'useless'.
- 役立たずやくたたずno-adjectiveA person or thing that fails to serve its role: a useless worker, tool, or machine. Applied to people it is a blunt insult, close to calling someone good-for-nothing.
- 役に立たないやくにたたないexpression, i-adjectiveThe plain negative of 'to be useful': something or someone is of no use and doesn't help. The neutral, all-purpose way to say 'useless' of tools, advice, people, or efforts.
Use 「だめ」 for the broad 'no good, broken' sense, 「役に立たない」 as the neutral 'of no use' phrase, 「役立たず」 for a useless person or thing, and 無益 for futile efforts, while 無用 often means 'unnecessary' rather than 'useless'.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
- だめno good
- 無用むようuseless
- 無益むえきuseless
- 役立たずやくたたずuseless
- 役に立たないやくにたたないof no avail
- くだらないtrivial
- いたずらuseless
- 半人はんにんuseless
- あかんuseless
- 甲斐がないかいがないuseless
- あきまへんuseless
- 益体もないやくたいもないuseless
- 意味がないいみがないuseless
- あかへんuseless
- 甲斐無いかいないworthless
- から下手からへたutterly lacking (in ability)
- 用無しようなしunnecessary
- 使い物にならないつかいものにならないof no use
- 用に足りないようにたりないof no use
- 何の役にも立たないなんのやくにもたたないof no use whatsoever
- ろくでもないgood-for-nothing
- 無くもがななくもがなcan be dispensed with
- 屁の突っ張りにもならないへのつっぱりにもならないof no use whatsoever
- 役にも立たないやくにもたたないof no use whatsoever
- へっぽこhack
- 不甲斐ないふがいないgood-for-nothing
- 迂遠うえんroundabout
- くだらんtrivial
- くだらぬtrivial
- 仕方ないしかたないit's no use (doing)
- やくざuseless
- いけないuseless
- 仕方がないしかたがないit's no use (doing)
- しょうがないit's no use (doing)
- ぽんこつclumsy
- 不用ふようuseless
- いけんuseless
- 死にしにdead
- 仕方のないしかたのないpointless
- 致し方ないいたしかたないit's no use (doing)
- 半人前はんにんまえinexperienced
- いぬcounterfeit
- つまらないuseless
- つまらぬuseless
- つまらんuseless
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