Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-West Germanic
*þegn
→
English
thane
(inherited)
→
Old English
þegn
(inherited)
→
Irish
taen
(derived)
→
Old High German
degan
(inherited)
→
Dutch
degen
(inherited)