Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Germanic
*fruþgô
→
English
frog
(inherited)
→
Old English
frocga
(inherited)
→
Middle English
frogge
(inherited)
→
Marshallese
būro̧k
(derived)