Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
anse
←
Proto-Celtic
*[[an-]][[sādos|sādo-]]syos
(inherited)
←
Welsh
anodd
(cognate)
←
Old Irish
an-
(affix)
←
Old Irish
asse
(affix)
←
Middle Welsh
anhawð
(cognate)