Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Polish oko
Proto-Indo-European *h₃ekʷ- (derived)
Proto-Slavic *oko (inherited)

Belarusian бачыць (link)
Latvian aka (cognate)
Latvian acs (cognate)
Polish oczojebny (affix)
Polish baczyć (link)
Polish jednooki (affix)
Polish oczny (suffix)
Polish oczysko (affix)
Polish oczodół (compound)
Polish zielonooki (affix)
Polish obuoczny (affix)
Polish bystrooki (affix)
Polish okamgnienie (compound)
Polish przeoczyć (affix)
Polish przeoczać (affix)
Polish skośnooki (affix)
Ukrainian бачити (link)