Jisho

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Adverb, Adverb taking the 'to' particle
1. very; extremely; surprisingly; considerablyUsually written using kana alone
Na-adjective
2. contemptible; reprehensibleUsually written using kana alone
Other forms
ずい分 【ずいぶん】隨分 【ずいぶん】
Notes
隨分: Out-dated kanji.

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