Welsh

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Welsh numbers (edit)
500
 ←  40  ←  49 50 51  →  60  → 
5
    Cardinal (decimal): pum deg, (optionally before a nasal or vowel) pum deng
    Cardinal (vigesimal): hanner cant
    Ordinal: hanner canfed
    Ordinal abbreviation: 50fed

Alternative forms

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Etymology

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Literally, half a hundredth.

Adjective

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hanner canfed (feminine singular hanner canfed, plural hanner canfed, not comparable, not mutable)

  1. (ordinal number) fiftieth