Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Catalan genoll
Proto-Indo-European *ǵónu (inherited)
Latin (mention)
Latin genū (inherited)
Old Occitan genolh (inherited)

Catalan genollada (affix)
Catalan genollera (suffix)
Catalan agenollar-se (affix)
Spanish genol (borrowed)
French genou (cognate)