勃起|ぼっきbokki[0]heiban (flat)
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- noun, suru verb, intransitive verb, physiologyerection (of the penis); becoming erect; stiffening
- noun, suru verb, intransitive verbwelling up (of an emotion)
Conjugation
| Dictionary form | 勃起する(ぼっきする) |
|---|---|
| Polite (masu) | 勃起します(ぼっきします) |
| Negative (nai) | 勃起しない(ぼっきしない) |
| polite (masen) | 勃起しません(ぼっきしません) |
| classical zu / nu | 勃起せず・勃起せぬ(ぼっきせず・ぼっきせぬ) |
| Past (ta) | 勃起した(ぼっきした) |
| polite (mashita) | 勃起しました(ぼっきしました) |
| Past negative (nakatta) | 勃起しなかった(ぼっきしなかった) |
| polite (masen deshita) | 勃起しませんでした(ぼっきしませんでした) |
| Te form | 勃起して(ぼっきして) |
| Potential | 勃起できる(ぼっきできる) |
| Passive | 勃起される(ぼっきされる) |
| Causative | 勃起させる(ぼっきさせる) |
| Causative passive | 勃起させられる(ぼっきさせられる) |
| Conditional (ba) | 勃起すれば(ぼっきすれば) |
| tara | 勃起したら(ぼっきしたら) |
| Volitional | 勃起しよう(ぼっきしよう) |
| polite (mashou) | 勃起しましょう(ぼっきしましょう) |
| Imperative | 勃起しろ(ぼっきしろ) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Related硬化こうかWrittenWritten/formal prose. Covers hardening of substances or of attitudes and stances; it does not specifically denote a physiological erection.
- Related硬直こうちょくWrittenWritten/formal prose. Describes the body going stiff or rigid; in medical usage it can also refer to an erection.
- Antonym収縮しゅうしゅくNeutralNeutral term for contraction or shrinking — becoming smaller or shorter; the opposite of 「勃起」, which is swelling and standing erect.
- Antonym萎縮いしゅくWrittenWritten/formal prose. Withering, shrivelling or atrophy — shrinking and losing vigor; the opposite of 「勃起」 standing erect.
Use 「勃起」 for an erection (medical) or an emotion welling up. For hardening of substances or attitudes choose 「硬化」; for a body going stiff, 「硬直」 (also erection in medical use). The opposites are 「収縮」, neutral contraction, and 「萎縮」, written atrophy.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


