Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
aite
←
Proto-Indo-European
*átta
(inherited)
→
Irish
oide
(inherited)
→
Scottish Gaelic
oide
(inherited)
→
Manx
gedjey
(derived)