Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
eddyr
←
Irish
idir
(cognate)
←
Old Irish
eter
(inherited)
→
Manx
eddyr-
(mention)
→
Manx
neueddyrghoaill
(compound)