Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
scolu
←
Proto-Germanic
*skulō
(inherited)
←
Proto-Indo-European
*(s)kelH-
(derived)
→
English
school
(cognate)