Welsh

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Etymology

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blwydd +‎ -iadur

Noun

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blwyddiadur m (plural blwyddiaduron)

  1. yearbook, annual

Mutation

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Mutated forms of blwyddiadur
radical soft nasal aspirate
blwyddiadur flwyddiadur mlwyddiadur unchanged

Note: Certain mutated forms of some words can never occur in standard Welsh.
All possible mutated forms are displayed for convenience.