Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
daingen
←
Proto-Indo-European
*dʰegʷʰ-
(mention)
→
Irish
daingean
(inherited)
→
Scottish Gaelic
daingeann
(inherited)