Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Serbo-Croatian
ciča
←
Proto-Indo-European
*kaykos
(derived)
←
Latin
caecus
(cognate)
←
Russian
чи́чий
(cognate)
←
Old Irish
cáech
(cognate)