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adjectival nouns or quasi-adjectives (keiyodoshi)
enough, sufficient, plenty, adequate, satisfactory
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私はこの本を買うのに十分なお金を持っている。
I have enough money to buy this book.
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adverb (fukushi)
sufficiently, fully, thoroughly, well, perfectly
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「もっと召し上がりますか」「いいえ、じゅうぶんいただきました」
"Would you like any more?" "No, I've had enough."
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noun (common) (futsuumeishi), noun or participle which takes the aux. verb suru, transitive verb
division into ten