Welsh

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Etymology

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From prifathro (headmaster, headteacher) +‎ -on.

Noun

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prifathrawon m pl

  1. plural of prifathro

Mutation

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Welsh mutation
radical soft nasal aspirate
prifathrawon brifathrawon mhrifathrawon phrifathrawon
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.