Welsh edit

Etymology edit

tan- +‎ daear +‎ -ol

Adjective edit

tanddaearol (feminine singular tanddaearol, plural tanddaearol, not comparable)

  1. underground, subterranean

Mutation edit

Welsh mutation
radical soft nasal aspirate
tanddaearol danddaearol nhanddaearol thanddaearol
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.