Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
aralt
←
Old French
heralt
(borrowed)
←
Proto-Germanic
*harjawaldaz
(derived)
→
Irish
araltas
(affix)
→
Irish
araltach
(suffix)