Welsh edit

Etymology edit

blwydd +‎ -iadur

Noun edit

blwyddiadur m (plural blwyddiaduron)

  1. yearbook, annual

Mutation edit

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