Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Indo-European
*déḱos
→
Proto-Celtic
Lughaidh
(inherited(cel-pro/ga))
→
Proto-Celtic
Lugaid
(inherited(cel-pro/sga))
→
Latin
decus
(inherited)