Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
shiaghtinoil
←
Irish
seachtainiúil
(cognate)
←
Manx
shiaghtin
(affix)
←
Manx
-oil
(affix)