Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
leztad
←
Breton
lez
(prefix)
←
Breton
tad
(prefix)
←
Welsh
llystad
(cognate)
→
Welsh
llystad
(cognate)