Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Manx goo
Proto-Celtic *gutus (inherited)
Proto-Indo-European (inherited)
Proto-Indo-European *ǵʰewH- (mention)
Old Irish guth (inherited)

Manx bun-ghooaght (confix)
Manx gooaght (suffix)
Manx gooagh (affix)
Manx coghooagh (affix)
Manx ard-ghoo (prefix)
Manx neughooagh (affix)