Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
cooid
←
Breton
pezh
(cognate)
←
Proto-Celtic
*kʷesdis
(derived)
←
Welsh
peth
(cognate)
←
Old Irish
cuit
(inherited)