Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Germanic
*sīką
→
English
sike
(inherited)
→
English
sicker
(derived)
→
English
sitch
(inherited)
→
Old English
sicerian
(cognate)
→
Icelandic
síki
(inherited)