Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
fel
←
Breton
evel
(cognate)
←
Irish
samhail
(cognate)
←
Proto-Indo-European
*sem-
(derived)
←
Latin
similis
(cognate)
→
Welsh
â
(link)
→
Welsh
fel arfer
(compound)