Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
cwalu
←
Proto-West Germanic
*kwalu
(inherited)
→
Old English
selfcwalu
(prefix)
→
Old English
liegcwalu
(compound)
→
Saterland Frisian
Kwoal
(cognate)