Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
cummaght
←
Irish
cumhacht
(cognate)
←
Scottish Gaelic
cumhachd
(cognate)
←
Old Irish
cumachtae
(inherited)
→
Manx
ard-chummaght
(prefix)
→
Manx
neuchummaghtagh
(affix)
→
Manx
neuchummaght
(affix)