Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
ialtóg
←
Scottish Gaelic
ialtag
(cognate)
←
Middle Irish
*íaltóc
(inherited)
←
Old Irish
íatlu
(derived)
←
Old Irish
-óc
(mention)
→
Scottish Gaelic
ialtag
(cognate)