Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
indidit
←
Proto-Celtic
*wēdos
(derived)
←
Proto-Indo-European
*weyd-
(root)
←
Old Irish
ind-
(affix)
←
Old Irish
fíad
(mention)