Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
Hwevrel
←
Breton
C’hwevrer
(cognate)
←
Welsh
Chwefror
(cognate)
←
Latin
februārius
(derived)