Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
roth
←
Proto-Celtic
*rotos
(inherited)
←
Proto-Indo-European
*Hroth₂os
(inherited)
←
Old Irish
roth
(inherited)
→
Irish
rothar
(mention)
→
Irish
rothaí
(suffix)