Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
caisg
←
Middle Irish
coiscid
(inherited)
←
Old Irish
con·secha
(inherited)
→
Scottish Gaelic
caisgire
(suffix)