Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
pemp
←
Proto-Brythonic
*pɨmp
(inherited)
←
Proto-Celtic
*kʷinkʷe
(inherited)
←
Proto-Indo-European
*pénkʷe
(inherited)
→
English
pimp
(cognate)
→
Breton
pemzek
(compound)