寝坊する · noun or participle which takes 'suru'
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 寝坊する | 寝坊しない |
| Polite | 寝坊します | 寝坊しません |
| Past polite | 寝坊しました | 寝坊しませんでした |
| Past | 寝坊した | 寝坊しなかった |
| Te-form | 寝坊して | 寝坊しないで |
| Desire | 寝坊したい | 寝坊したくない |
| Potential | 寝坊できる | 寝坊できない |
| Passive | 寝坊される | 寝坊されない |
| Causative | 寝坊させる | 寝坊させない |
| Causative passive | 寝坊させられる | 寝坊させられない |
| Volitional | 寝坊しよう | |
| Polite volitional | 寝坊しましょう | |
| Imperative | 寝坊しろ | 寝坊するな |
| Conditional | 寝坊すれば | 寝坊しなければ |
| Tara conditional | 寝坊したら | 寝坊しなかったら |
noun, noun or participle which takes 'suru', intransitive verb, na-adjective, noun which may take the genitive case particle 'no'
oversleeping; sleeping in late
Refers to the act of sleeping past the intended time, often resulting in being late. Commonly used as a noun or with する to mean 'to oversleep'.
I overslept this morning and was late for school.
I set an alarm so I wouldn't oversleep.
late riser; sleepyhead
Refers to a person who habitually sleeps in or is a late riser. Often used in a light, teasing manner.
He's a real sleepyhead and always sleeps until noon on his days off.
I overslept this morning.
He's always a late riser.
I overslept and was late for the meeting.
My son is a kid who's a late riser.
寝坊 means oversleeping in the morning, whereas 居眠り is nodding off briefly while sitting during the day.
寝坊 means oversleeping or waking up late, which is the opposite situation from 寝不足's lack of sleep, though both share the kanji 寝 and are easy to mix up.