Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
gnáthach
←
Proto-Indo-European
*ǵneh₃-
(root)
←
Old Irish
gnáth
(suffix)
←
Old Irish
ach
(suffix)
→
Irish
gnách
(inherited)