Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romansch
canzun
←
Proto-Indo-European
*kan-
(derived)
←
Latin
cantio
(inherited)
←
Latin
cantus
(mention)
←
Latin
cano
(mention)