肥大|ひだいhidai[0]heiban (flat)
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- noun, suru verb, intransitive verbswelling; enlargement; becoming fat
- noun, suru verb, intransitive verb, medicinehypertrophy
Conjugation
| Dictionary form | 肥大する(ひだいする) |
|---|---|
| Polite (masu) | 肥大します(ひだいします) |
| Negative (nai) | 肥大しない(ひだいしない) |
| polite (masen) | 肥大しません(ひだいしません) |
| classical zu / nu | 肥大せず・肥大せぬ(ひだいせず・ひだいせぬ) |
| Past (ta) | 肥大した(ひだいした) |
| polite (mashita) | 肥大しました(ひだいしました) |
| Past negative (nakatta) | 肥大しなかった(ひだいしなかった) |
| polite (masen deshita) | 肥大しませんでした(ひだいしませんでした) |
| Te form | 肥大して(ひだいして) |
| Potential | 肥大できる(ひだいできる) |
| Passive | 肥大される(ひだいされる) |
| Causative | 肥大させる(ひだいさせる) |
| Causative passive | 肥大させられる(ひだいさせられる) |
| Conditional (ba) | 肥大すれば(ひだいすれば) |
| tara | 肥大したら(ひだいしたら) |
| Volitional | 肥大しよう(ひだいしよう) |
| polite (mashou) | 肥大しましょう(ひだいしましょう) |
| Imperative | 肥大しろ(ひだいしろ) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonym肥満ひまんNeutralWhole-body obesity or excess weight; common in medical contexts. 「肥大」 instead refers to enlarged organs, tissues or scale.
- Related太り肉ふとりじしNeutralOld-fashioned word for a plump, fleshy body; 「肥大」 usually describes organs or tissues enlarging, not a fat person.
- RelatedデブCasualSlang for a fat person or being fat; contemptuous and impolite, unlike the neutral 「肥大」.
- RelatedぽってりNeutralMimetic word for something round, plump and thick, as in 「ぽってりした唇」; carries a cute feel that 「肥大」 lacks.
- RelatedでぶっちょCasualColloquial, teasing nickname for a fat person; not used for organs or tissues the way 「肥大」 is.
- Related肉付きの良いにくづきのよいNeutralDescribes a well-fleshed, well-proportioned figure with a positive nuance; unlike 「肥大」, not used for organs.
- Antonym縮小しゅくしょうNeutralMaking something smaller or reducing its scale; the opposite of 「肥大」.
- Antonym萎縮いしゅくNeutralWithering, shrivelling or atrophy; also used for cowering or losing vigor. The opposite of 「肥大」.
Use 「肥大」 for organs or tissues enlarging or for scale expanding, as in 「前立腺肥大」 and 「組織の肥大化」. For human obesity say 「肥満」, colloquially 「デブ」. The opposites are 「萎縮」 and 「縮小」.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


