Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
kuth
←
Proto-Germanic
*kunþaz
(inherited)
←
Proto-Indo-European
*ǵneh₃-
(root)
←
Old Saxon
kunnan
(mention)
→
Old English
cuþ
(cognate)