Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
armthae
←
Latin
armō
(derived)
←
Old Irish
armaid
(mention)
←
Old Irish
-the
(affix)
→
Old Irish
armthatu
(affix)