Jisho

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Adverb (fukushi)
1. earnestly; intently; determinedly; by all meansUsually written using kana alone, Archaic
Adverb (fukushi)
2. ... the heck (e.g. "what the heck?"); ... in the world (e.g. "why in the world?"); ... on earth (e.g. "who on earth?")Usually written using kana alone, Archaic, See also 一体全体 いったいぜんたい

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