Welsh

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Etymology

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From peiriannydd +‎ -iaeth.

Noun

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peirianyddiaeth f (uncountable)

  1. engineering
    Synonym: peirianneg

Mutation

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Welsh mutation
radical soft nasal aspirate
peirianyddiaeth beirianyddiaeth mheirianyddiaeth pheirianyddiaeth
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.