English

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English numbers (edit)
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4
    Cardinal: forty
    Ordinal: fortieth
    Adverbial: forty times
    Multiplier: fortyfold

Etymology

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forty +‎ -fold

Adjective

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fortyfold (not comparable)

  1. By a multiple of forty; by forty times as much or as many.

Adverb

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fortyfold (not comparable)

  1. By a factor of forty.