Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
torri
←
Breton
torriñ
(cognate)
←
Proto-Indo-European
*terkʷ-
(derived)
←
Cornish
terri
(cognate)
→
Welsh
croestorri
(affix)
→
Welsh
toriad
(affix)