勃発・ぼっ発|ぼっぱつboppatsu[0]heiban (flat)
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Which spelling to use
勃発勃発 is the more common form and the one beginners should use; it is written entirely in kanji.
ぼっ発ぼっ発 is a less common mixed kanji-kana variant; recognize it as an alternative, but use 勃発 for your own writing.
Definitions
- noun, suru verb, intransitive verboutbreak (e.g. of war); outburst; sudden occurrence
Conjugation
| Dictionary form | 勃発する（ぼっぱつする） |
|---|---|
| Polite (masu) | 勃発します（ぼっぱつします） |
| Negative (nai) | 勃発しない（ぼっぱつしない） |
| polite (masen) | 勃発しません（ぼっぱつしません） |
| classical zu / nu | 勃発せず・勃発せぬ（ぼっぱつせず・ぼっぱつせぬ） |
| Past (ta) | 勃発した（ぼっぱつした） |
| polite (mashita) | 勃発しました（ぼっぱつしました） |
| Past negative (nakatta) | 勃発しなかった（ぼっぱつしなかった） |
| polite (masen deshita) | 勃発しませんでした（ぼっぱつしませんでした） |
| Te form | 勃発して（ぼっぱつして） |
| Potential | 勃発できる（ぼっぱつできる） |
| Passive | 勃発される（ぼっぱつされる） |
| Causative | 勃発させる（ぼっぱつさせる） |
| Causative passive | 勃発させられる（ぼっぱつさせられる） |
| Conditional (ba) | 勃発すれば（ぼっぱつすれば） |
| tara | 勃発したら（ぼっぱつしたら） |
| Volitional | 勃発しよう（ぼっぱつしよう） |
| polite (mashou) | 勃発しましょう（ぼっぱつしましょう） |
| Imperative | 勃発しろ（ぼっぱつしろ） |
Common forms generated by rule; see the senses for honorific or irregular usage.
Synonyms & antonyms
- Synonym突発とっぱつWrittenWritten/formal. Refers to anything happening suddenly and unexpectedly, with a wide range of uses, as in 「突発事故」; 「勃発」 is mostly for wars and events breaking out.
- Antonym沈静ちんせいWrittenWritten/formal. Means calming down and growing quiet — the opposite of the sudden outbreak expressed by 「勃発」.
- Antonym収束しゅうそくWrittenWritten/formal. Means a situation settling or being brought to a close, the opposite of 「勃発」, as in 「混乱が収束」.
Use 「勃発」 when a war, event or dispute suddenly breaks out, as in 「戦争が勃発する」. For unexpected sudden accidents use 「突発」; when a situation calms down or is resolved, use 「収束」.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese definitions
Kanji in this word
English equivalents
