Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
cuileag
←
Middle Irish
cuileóc
(inherited)
←
Old Irish
cuil
(derived)
→
Irish
cuil
(cognate)
→
Scottish Gaelic
meanbh-chuileag
(compound)