Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
immráidi
←
Proto-Indo-European
*Hreh₁dʰ-
(root)
←
Old Irish
imm-
(affix)
←
Old Irish
ráidid
(affix)