Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
lus
←
Old Irish
lus
(inherited)
→
Irish
lus na seabhac
(compound)
→
Irish
aelus
(affix)
→
Irish
lus an choire
(compound)
→
Irish
lus an ghrá
(compound)