無害|むがいmugai[1]atamadaka (head-high)
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- na-adjective, no-adjectiveharmless
Conjugation
| Plain form | 無害(むがい) |
|---|---|
| Polite (desu) | 無害です(むがいです) |
| Negative (dewa nai) | 無害ではない(むがいではない) |
| polite (dewa arimasen) | 無害ではありません(むがいではありません) |
| Past (datta) | 無害だった(むがいだった) |
| Past negative (dewa nakatta) | 無害ではなかった(むがいではなかった) |
| Te form (de) | 無害で(むがいで) |
| Adverbial (ni) | 無害に(むがいに) |
| Conditional (nara) | 無害なら(むがいなら) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonym安全あんぜんNeutralThe most general word for being safe and free from danger. 「無害」 specifically stresses that no harm is produced.
- Synonym無難ぶなんNeutralMeans safe and unlikely to go wrong, as in 「無難な選択」. 「無害」 stresses causing no harm, as in 「無害な発言」.
- Synonym差し障りのないさしさわりのないNeutralDescribes things that offend no one or hurt no feelings; often used of topics or replies. 「無害」 instead stresses causing no actual harm.
- Antonym有害ゆうがいNeutralMeans harmful, as in 「有害物質」; the direct opposite of 「無害」.
- Antonym危険きけんNeutralMeans dangerous; it stands opposite to the harmlessness expressed by 「無害」.
Use 「無害」 for things that cause no harm to people or the environment, as in 「人体に無害」. For safety say 「安全」, for a safe, reliable choice 「無難」, and for the opposite 「有害」.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


