Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Irish cumas
Irish acmhainn (link)
Irish acmhainneacht (link)
Irish poitéinseal (link)
Irish infheidhmeacht (link)
Irish bua (link)
Irish mianach (link)
Irish ábaltacht (link)
Irish inniúlacht (link)
Irish cumasach (link)
Irish ilchumas (link)
Old Irish commus (inherited)
Old Irish con·midethar (cognate)
Old Irish midithir (mention)
Old Irish com- (mention)

Irish ilchumas (affix)
Irish cumasach (affix)