Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
pobal
←
Welsh
pobl
(cognate)
←
Latin
populus
(derived)
←
Old Irish
popul
(inherited)
→
Welsh
pobl
(cognate)
→
Irish
poblacht
(suffix)
→
Irish
pobalda
(affix)
→
Irish
poiblí
(affix)
→
Irish
pobalscoil
(affix)
→
Irish
pobalbhreith
(affix)