Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
English oily
German ölig (cognate)
English oil (suffix)
English y (suffix)
Middle English oylei (inherited)
Swedish oljig (cognate)

English oiliness (suffix)
English oilily (suffix)
English nonoily (prefix)
English unoily (prefix)
English oilyish (suffix)