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noun (common) (futsuumeishi), noun or participle which takes the aux. verb suru, intransitive verb, adjectival nouns or quasi-adjectives (keiyodoshi), nouns which may take the genitive case particle 'no'
sleeping in late, oversleeping
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彼はときどき寝坊する。
He sometimes sleeps in.
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noun (common) (futsuumeishi)
late riser, sleepyhead