膨大する · noun or participle which takes 'suru'
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 膨大する | 膨大しない |
| Polite | 膨大します | 膨大しません |
| Past polite | 膨大しました | 膨大しませんでした |
| Past | 膨大した | 膨大しなかった |
| Te-form | 膨大して | 膨大しないで |
| Desire | 膨大したい | 膨大したくない |
| Potential | 膨大できる | 膨大できない |
| Passive | 膨大される | 膨大されない |
| Causative | 膨大させる | 膨大させない |
| Causative passive | 膨大させられる | 膨大させられない |
| Volitional | 膨大しよう | |
| Polite volitional | 膨大しましょう | |
| Imperative | 膨大しろ | 膨大するな |
| Conditional | 膨大すれば | 膨大しなければ |
| Tara conditional | 膨大したら | 膨大しなかったら |
この研究には膨大な資料を読む必要がある。
This research requires reading a vast amount of material.
There is an enormous amount of information online.
noun, noun or participle which takes 'suru', intransitive verb
swelling; expansion; expand greatly
Only when written 膨大
Less common noun and intransitive する-verb use, restricted to the spelling 膨大. In modern writing, 膨張する, 膨らむ, or 増大する may be more natural depending on the context.
As the project dragged on, the expenses kept expanding.
We have to analyze a huge amount of data.
The amount of documents has grown so huge that organizing them is a real task.
This project took an enormous amount of time and effort.
Building a new factory requires an enormous amount of money.
巨大 emphasizes physical size, like a huge building or creature, whereas 膨大 is typically used for quantities, data, or costs.
増大 describes a gradual increase in size or amount, while 膨大 (as a verb) suggests a sudden or dramatic swelling.