Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
English placate
Old English flōh (cognate)
English please (link)
Proto-Indo-European *plāk- (derived)
Proto-Indo-European *pele- (mention)
Latin plācātus (borrowed)
Latin plācō (mention)
Latin placeō (cognate)

English plea (mention)
English supple (link)
English placater (suffix)
English placative (suffix)
English placatable (suffix)