Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
sneachtúil
←
Irish
sneachta
(affix)
←
Irish
-úil
(affix)
←
Old Irish
snechtamail
(inherited)
→
Scottish Gaelic
sneachdail
(cognate)