Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
ultach
←
Old Irish
utlach
(inherited)
←
Old Irish
ultach
(mention)
←
Old Irish
uth
(mention)
←
Old Irish
-lach
(mention)