Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*subi
→
Welsh
syfi
(inherited)
→
Manx
soo
(inherited)
→
Cornish
sevi
(inherited)
→
Old Irish
suib
(inherited)