Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
eud
←
Irish
éad
(cognate)
←
Proto-Indo-European
*yeh₂-
(root)
←
Old Irish
ét
(inherited)
→
Irish
éad
(cognate)
→
Scottish Gaelic
eudail
(affix)
→
Scottish Gaelic
eudmhor
(suffix)