勃起する · noun or participle which takes 'suru'
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 勃起する | 勃起しない |
| Polite | 勃起します | 勃起しません |
| Past polite | 勃起しました | 勃起しませんでした |
| Past | 勃起した | 勃起しなかった |
| Te-form | 勃起して | 勃起しないで |
| Desire | 勃起したい | 勃起したくない |
| Potential | 勃起できる | 勃起できない |
| Passive | 勃起される | 勃起されない |
| Causative | 勃起させる | 勃起させない |
| Causative passive | 勃起させられる | 勃起させられない |
| Volitional | 勃起しよう | |
| Polite volitional | 勃起しましょう | |
| Imperative | 勃起しろ | 勃起するな |
| Conditional | 勃起すれば | 勃起しなければ |
| Tara conditional | 勃起したら | 勃起しなかったら |
noun, noun or participle which takes 'suru', intransitive verb
penile erection; becoming erect; stiffening
A direct physiological or medical term, most commonly for erection of the penis. As a suru verb it is intransitive: 陰茎が勃起する, not 陰茎を勃起する.
The penis may become erect when sexually stimulated.
If an erection lasts a long time, please consult a doctor.
noun, noun or participle which takes 'suru', intransitive verb
welling up of emotion; surge of feeling
Rare, literary, and potentially old-fashioned use for an emotion suddenly rising up. In modern ordinary Japanese, words such as わき起こる or 高まる are more natural.
In older writing, 勃起する can be used in expressions like “anger wells up,” meaning that an emotion suddenly arises.
The penis becomes erect when sexually excited.
Using that medicine makes it easier to maintain an erection.
priapism