Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*tangʷāt-
→
Welsh
tafod
(inherited)
→
Irish
teanga
(inherited)
→
Scottish Gaelic
teanga
(inherited)
→
Cornish
taves
(inherited)