Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Irish -igh
← Proto-Celtic *-sagyetor (inherited)
← Welsh -hau (cognate)
← Scottish Gaelic -ich (cognate)
← Proto-Indo-European *seh₂g- (root)
← Old Irish -igidir (inherited)

→ Welsh -hau (cognate)
→ Irish ceannaigh (affix)
→ Irish bailigh (affix)
→ Irish reoigh (affix)
→ Irish saothraigh (affix)
→ Irish -iú (affix)
→ Irish maraigh (affix)
→ Irish uraigh (affix)
→ Irish dathaigh (affix)
→ Irish básaigh (affix)
→ Irish -íonn (suffix)
→ Irish cuidigh (affix)
→ Irish ainmnigh (affix)
→ Irish maisigh (affix)
→ Irish glónraigh (affix)
→ Irish balsamaigh (affix)
→ Irish gnéasaigh (affix)
→ Irish stánaigh (affix)
→ Irish onóraigh (affix)
→ Irish teorannaigh (affix)
→ Irish coilltigh (affix)
→ Irish foraoisigh (affix)
→ Irish adamhaigh (affix)
→ Irish fotheidealaigh (affix)
→ Irish geoidligh (affix)
→ Irish dátaigh (affix)
→ Irish gloinigh (affix)
→ Irish léirigh (affix)
→ Irish feistigh (affix)
→ Irish céaslaigh (affix)
→ Irish pionósaigh (affix)
→ Irish troitheánaigh (affix)
→ Irish fuaraigh (affix)
→ Irish stroighnigh (affix)
→ Irish treisigh (affix)
→ Irish imlínigh (affix)
→ Irish peacaigh (affix)
→ Irish talmhaigh (affix)
→ Irish naomhaigh (affix)
→ Irish cruinnigh (affix)