Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
coþu
←
Proto-Germanic
*kuþō
(inherited)
→
English
disease
(cognate)
→
English
coath
(inherited)
→
Middle English
cothe
(inherited)
→
Middle English
quath
(inherited)