Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
German
mittun
←
German
mit
(prefix)
←
German
tun
(prefix)
←
Hunsrik
mitdun
(cognate)
←
Dutch
meedoen
(cognate)