Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
English ed-
Old English ed- (inherited)
Welsh ad- (cognate)
Welsh ed- (cognate)
German - (cognate)
Middle English ed- (inherited)
Proto-Germanic *idi- (inherited)
Proto-Germanic *idi (mention)
Proto-Germanic *ida (mention)
Middle High German it- (mention)
Gothic 𐌹𐌳- (cognate)
Proto-Indo-European *éti (inherited)
Icelandic ið- (cognate)
Latin et (cognate)
Latin at (cognate)
Dutch et- (cognate)

English eddy (affix)
Welsh ad- (cognate)
Latin et (link)
Swedish idissla (cognate)