Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
adharcach
←
English
horny
(semantic loan)
←
Irish
adharc
(affix)
←
Irish
-ach
(affix)
←
Middle Irish
adarcach
(inherited)
→
Irish
adharcachán
(affix)
→
Manx
eairkagh
(cognate)