Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
aontaich
←
Irish
aontaigh
(cognate)
←
Middle Irish
óentaigid
(inherited)
←
Old Irish
óentach
(inherited)
←
Old Irish
óen
(mention)
→
Irish
aontaigh
(cognate)
→
Scottish Gaelic
co-aontaich
(prefix)
→
Scottish Gaelic
eas-aontaich
(prefix)