Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
figh
←
Proto-Celtic
*wegyeti
(inherited)
←
Proto-Indo-European
*weg-
(derived)
←
Old Irish
figid
(inherited)
→
Irish
fíodóir
(affix)
→
Irish
idirfhigh
(affix)
→
Manx
fee
(cognate)