Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*ouxsterom
→
Irish
uachtar
(inherited)
→
Scottish Gaelic
uachdar
(inherited)
→
Manx
eaghtyr
(inherited)
→
Old Irish
úachtar
(inherited)