退屈|たいくつtaikutsu[0]heiban (flat)
This browser can't play pronunciations (needs Safari 18.4 or later, or Chrome / Edge / Firefox).
- na-adjective, nountedious; boring; dull; uninteresting; tiresome; monotonous
- suru verb, intransitive verbto feel bored; to get bored (with); to get tired (of)
Conjugation
| Dictionary form | 退屈する(たいくつする) |
|---|---|
| Polite (masu) | 退屈します(たいくつします) |
| Negative (nai) | 退屈しない(たいくつしない) |
| polite (masen) | 退屈しません(たいくつしません) |
| classical zu / nu | 退屈せず・退屈せぬ(たいくつせず・たいくつせぬ) |
| Past (ta) | 退屈した(たいくつした) |
| polite (mashita) | 退屈しました(たいくつしました) |
| Past negative (nakatta) | 退屈しなかった(たいくつしなかった) |
| polite (masen deshita) | 退屈しませんでした(たいくつしませんでした) |
| Te form | 退屈して(たいくつして) |
| Potential | 退屈できる(たいくつできる) |
| Passive | 退屈される(たいくつされる) |
| Causative | 退屈させる(たいくつさせる) |
| Causative passive | 退屈させられる(たいくつさせられる) |
| Conditional (ba) | 退屈すれば(たいくつすれば) |
| tara | 退屈したら(たいくつしたら) |
| Volitional | 退屈しよう(たいくつしよう) |
| polite (mashou) | 退屈しましょう(たいくつしましょう) |
| Imperative | 退屈しろ(たいくつしろ) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Related倦怠けんたいWrittenWritten; weariness or ennui, as in 「倦怠感」 and 「倦怠期」. It leans toward physical and mental fatigue rather than plain boredom.
- RelatedアンニュイWrittenWritten; a loanword (from French ennui) for a languid, listless weariness, with a literary, arty flavour.
- Related無聊ぶりょうWrittenWritten; idle tedium with nothing to do, met mostly in the set phrase 「無聊を託つ」.
- RelatedうんざりするNeutralFed up, sick of something, as in 「長話にうんざりする」; it carries a sense of having had enough, whereas 「退屈」 is about having nothing interesting going on.
- Antonym面白いおもしろいNeutralAntonym: interesting, fun to watch or listen to; the opposite of a dull 「退屈」 experience.
- Antonym楽しいたのしいNeutralAntonym: enjoyable, happy, having a good time; set against the boredom of 「退屈」.
- Antonym刺激的しげきてきNeutralAntonym: stimulating, exciting; the opposite of monotonous, uneventful 「退屈」.
Use 「退屈」 for being bored with nothing to do or for something monotonous. Say 「うんざり」 when you are fed up, 「倦怠」 for weary fatigue of body and mind. The opposites are 「面白い」 and 「楽しい」.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


