Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
tuit
←
Proto-Indo-European
*(s)tewd-
(root)
←
Old Irish
do·tuit
(inherited)
→
Scottish Gaelic
ath-thuit
(prefix)