teirgwaith

Welsh

Etymology

tair (“three”) +‎ gwaith (“time”)

Adverb

teirgwaith

1. thrice

Mutation

Welsh mutation
radical	soft	nasal	aspirate
teirgwaith	deirgwaith	nheirgwaith	theirgwaith
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.