Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*tangʷāss
→
Breton
teod
(inherited)
→
Manx
çhengey
(inherited)
→
Old Irish
tengae
(inherited)