Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*gasliyā
→
Breton
gast
(derived)
→
Welsh
gast
(derived)
→
Irish
galla
(derived(ga/gd))