Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
roc'h
←
English
rock
(cognate)
←
Spanish
roca
(cognate)
←
French
roche
(cognate)
←
Italian
rocca
(cognate)
→
English
rock
(cognate)
→
French
roche
(cognate)
→
Portuguese
rocha
(cognate)