失笑する · noun or participle which takes 'suru'
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 失笑する | 失笑しない |
| Polite | 失笑します | 失笑しません |
| Past polite | 失笑しました | 失笑しませんでした |
| Past | 失笑した | 失笑しなかった |
| Te-form | 失笑して | 失笑しないで |
| Desire | 失笑したい | 失笑したくない |
| Potential | 失笑できる | 失笑できない |
| Passive | 失笑される | 失笑されない |
| Causative | 失笑させる | 失笑させない |
| Causative passive | 失笑させられる | 失笑させられない |
| Volitional | 失笑しよう | |
| Polite volitional | 失笑しましょう | |
| Imperative | 失笑しろ | 失笑するな |
| Conditional | 失笑すれば | 失笑しなければ |
| Tara conditional | 失笑したら | 失笑しなかったら |
noun, noun or participle which takes 'suru', intransitive verb
involuntary laughter; laughing despite oneself
Laughing when one should not, or being unable to suppress laughter. Often used in situations where laughter is socially inappropriate.
I burst out laughing at the solemn ceremony.
Seeing his serious face, I couldn't help but laugh.
noun, noun or participle which takes 'suru', intransitive verb
scornful laughter; snicker
Colloquial use for laughing at someone or something with contempt or ridicule. Less common than the involuntary-laughter sense.
Everyone snickered at his story of failure.