介入|かいにゅうkainyuu[0]heiban (flat)
This browser can't play pronunciations (needs Safari 18.4 or later, or Chrome / Edge / Firefox).
- noun, suru verb, intransitive verbintervention
Conjugation
| Dictionary form | 介入する(かいにゅうする) |
|---|---|
| Polite (masu) | 介入します(かいにゅうします) |
| Negative (nai) | 介入しない(かいにゅうしない) |
| polite (masen) | 介入しません(かいにゅうしません) |
| classical zu / nu | 介入せず・介入せぬ(かいにゅうせず・かいにゅうせぬ) |
| Past (ta) | 介入した(かいにゅうした) |
| polite (mashita) | 介入しました(かいにゅうしました) |
| Past negative (nakatta) | 介入しなかった(かいにゅうしなかった) |
| polite (masen deshita) | 介入しませんでした(かいにゅうしませんでした) |
| Te form | 介入して(かいにゅうして) |
| Potential | 介入できる(かいにゅうできる) |
| Passive | 介入される(かいにゅうされる) |
| Causative | 介入させる(かいにゅうさせる) |
| Causative passive | 介入させられる(かいにゅうさせられる) |
| Conditional (ba) | 介入すれば(かいにゅうすれば) |
| tara | 介入したら(かいにゅうしたら) |
| Volitional | 介入しよう(かいにゅうしよう) |
| polite (mashou) | 介入しましょう(かいにゅうしましょう) |
| Imperative | 介入しろ(かいにゅうしろ) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonym干渉かんしょうNeutralMeddling in others' affairs, with a negative nuance of imposing on them; also the physics term for wave interference. 「介入」 is more neutral.
- Antonym放任ほうにんWrittenLeaving things to take their own course without interference, as in 「放任主義」; the opposite of actively stepping in.
- Antonym放置ほうちNeutralLeaving something unattended or ignoring it, as in 「放置自転車」; contrasts with 「介入」, which is stepping in to deal with a matter.
- Antonym不介入ふかいにゅうWrittenNoninvolvement: staying neutral and not stepping into a matter or dispute; the direct opposite of 「介入」.
Use 「介入」 for a third party stepping in to intervene, as in 「軍事介入」. For meddling with a negative nuance, use 「干渉」. For not intervening, use 「不介入」; for leaving things alone, 「放任」 or 「放置」.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


