Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
faghteyr
←
Irish
fachtóir
(cognate)
←
Latin
factor
(derived)
→
Manx
co-faghteyr
(prefix)
→
Manx
ard-faghteyr
(prefix)