Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
cúpla
←
Old French
cople
(derived)
←
Latin
cōpula
(derived)
→
Irish
leathchúpla
(affix)
→
Irish
teirmeachúpla
(affix)