摩耗・磨耗|まもうmamou[0]heiban (flat)
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Which spelling to use
摩耗摩耗 is the more common written form of this word and the preferred choice for beginners. It is written entirely in kanji.
磨耗磨耗 is a less common written variant of 摩耗. It is also written entirely in kanji, but beginners should normally choose 摩耗 instead.
Definitions
- noun, suru verb, intransitive verbwear; abrasion
Conjugation
| Dictionary form | 摩耗する（まもうする） |
|---|---|
| Polite (masu) | 摩耗します（まもうします） |
| Negative (nai) | 摩耗しない（まもうしない） |
| polite (masen) | 摩耗しません（まもうしません） |
| classical zu / nu | 摩耗せず・摩耗せぬ（まもうせず・まもうせぬ） |
| Past (ta) | 摩耗した（まもうした） |
| polite (mashita) | 摩耗しました（まもうしました） |
| Past negative (nakatta) | 摩耗しなかった（まもうしなかった） |
| polite (masen deshita) | 摩耗しませんでした（まもうしませんでした） |
| Te form | 摩耗して（まもうして） |
| Potential | 摩耗できる（まもうできる） |
| Passive | 摩耗される（まもうされる） |
| Causative | 摩耗させる（まもうさせる） |
| Causative passive | 摩耗させられる（まもうさせられる） |
| Conditional (ba) | 摩耗すれば（まもうすれば） |
| tara | 摩耗したら（まもうしたら） |
| Volitional | 摩耗しよう（まもうしよう） |
| polite (mashou) | 摩耗しましょう（まもうしましょう） |
| Imperative | 摩耗しろ（まもうしろ） |
Common forms generated by rule; see the senses for honorific or irregular usage.
Synonyms & antonyms
- Related擦り切れるすりきれるNeutralFor clothes, rope and the like wearing through or breaking from friction; stresses the resulting damage. 摩耗 is more for machine parts being worn thin.
- Related磨り減るすりへるNeutralIntransitive: something gets worn down thin or smaller; also figurative for body and mind wearing out. 摩耗 is a written, technical term.
- Relatedすり減らすすりへらすNeutralTransitive: to wear something down, also figuratively to drain one's nerves or energy, as in 「神経をすり減らす」.
Use 「摩耗」 for wear from friction on machine parts or tires, as in 「タイヤの摩耗」; it is a technical, written term. In everyday speech say 「すり減る」; for clothes wearing through, 「擦り切れる」; for wearing down mind or nerves, 「すり減らす」.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese definitions
Kanji in this word
