退屈する · noun or participle which takes 'suru'
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 退屈する | 退屈しない |
| Polite | 退屈します | 退屈しません |
| Past polite | 退屈しました | 退屈しませんでした |
| Past | 退屈した | 退屈しなかった |
| Te-form | 退屈して | 退屈しないで |
| Desire | 退屈したい | 退屈したくない |
| Potential | 退屈できる | 退屈できない |
| Passive | 退屈される | 退屈されない |
| Causative | 退屈させる | 退屈させない |
| Causative passive | 退屈させられる | 退屈させられない |
| Volitional | 退屈しよう | |
| Polite volitional | 退屈しましょう | |
| Imperative | 退屈しろ | 退屈するな |
| Conditional | 退屈すれば | 退屈しなければ |
| Tara conditional | 退屈したら | 退屈しなかったら |
This movie was boring.
I got sleepy during the dull meeting.
noun or participle which takes 'suru', intransitive verb
feel bored; get bored; get tired of
Intransitive suru-verb expressing the state of feeling bored or weary. Often used with ~に or ~で to indicate the cause.
I'm bored because there's nothing to do.
He is getting tired of the same work.
He always gets bored during long meetings.
I ended up falling asleep during the boring class.
I read a book to distract myself from boredom.
Out of sheer boredom, I dozed off.
退屈 is the common, everyday word for boredom, whereas 倦怠 is more formal and can also suggest bodily languor.
退屈 is a more formal word describing objective tedium or boredom, while つまんない is a casual, subjective complaint about something being dull.