Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
gataid
←
Proto-Celtic
*ɸalnati
(mention)
←
Old Irish
gait
(mention)
←
Old Irish
to-
(affix)
←
Old Irish
do·alla
(mention)
→
Irish
gad
(inherited)
→
Irish
goid
(inherited)
→
Scottish Gaelic
goid
(inherited)
→
Old Irish
trisgata
(compound)