Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
fo-leftenant
←
English
lieutenant
(derived)
←
Irish
foleifteanant
(cognate)
←
Manx
fo
(prefix)
←
Manx
(prefix)