Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
comhlathas
←
Irish
flaitheas
(mention)
←
Irish
comh-
(affix)
←
Irish
-lathas
(affix)
←
Scottish Gaelic
co-fhlaitheas
(cognate)
←
Old Irish
comflaithius
(inherited)
→
Scottish Gaelic
co-fhlaitheas
(cognate)