English

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English numbers (edit)
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9
    Cardinal: ninety
    Ordinal: ninetieth
    Adverbial: ninety times
    Multiplier: ninetyfold

Etymology

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ninety +‎ -fold

Adjective

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ninetyfold (not comparable)

  1. By a factor of ninety.

Adverb

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ninetyfold (not comparable)

  1. By a factor of ninety.