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