Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
solas
←
Old Irish
solus
(inherited)
→
Irish
solasdíonach
(affix)
→
Irish
solasbhliain
(affix)
→
Manx
sollys
(cognate)