Jisho

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Adverb (fukushi), Adverb taking the 'to' particle
1. indiscriminately; blindly; at random; recklessly; thoughtlessly; excessively; profuselyUsually written using kana alone
Na-adjective (keiyodoshi)
2. indiscriminate; random; excessiveUsually written using kana alone
Notes
矢鱈: Ateji (phonetic) reading, Rarely-used kanji form.

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