Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
scáthán
←
Irish
scáth
(affix)
←
Irish
-án
(affix)
←
Middle Irish
scáthán
(inherited)
→
Manx
scaan
(cognate)