Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old High German
degan
←
Proto-Germanic
*þegnaz
(inherited)
←
Proto-West Germanic
*þegn
(inherited)
→
German
Degen
(derived)
→
Old High German
guotdegan
(compound)
→
Ancient Greek
τέκνον
(cognate)