腐心する · noun or participle which takes 'suru'
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 腐心する | 腐心しない |
| Polite | 腐心します | 腐心しません |
| Past polite | 腐心しました | 腐心しませんでした |
| Past | 腐心した | 腐心しなかった |
| Te-form | 腐心して | 腐心しないで |
| Desire | 腐心したい | 腐心したくない |
| Potential | 腐心できる | 腐心できない |
| Passive | 腐心される | 腐心されない |
| Causative | 腐心させる | 腐心させない |
| Causative passive | 腐心させられる | 腐心させられない |
| Volitional | 腐心しよう | |
| Polite volitional | 腐心しましょう | |
| Imperative | 腐心しろ | 腐心するな |
| Conditional | 腐心すれば | 腐心しなければ |
| Tara conditional | 腐心したら | 腐心しなかったら |
noun, noun or participle which takes 'suru', intransitive verb
take great pains; rack one's brains; make every effort
Describes putting intense mental effort into something, often with a sense of struggling or worrying over it. Commonly used in the pattern 〜に腐心する.
He is racking his brains to solve the problem.
I took great pains in planning the new project.
The company is racking its brains over developing a new product.
He has been racking his brains trying to solve the problem.