Welsh

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Etymology

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rhaid (need) +‎ -rwydd (-ness)

Pronunciation

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Noun

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rheidrwydd m (uncountable)

  1. compulsion, necessity

Derived terms

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Mutation

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Welsh mutation
radical soft nasal aspirate
rheidrwydd reidrwydd unchanged unchanged
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.