Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Indo-European
*h₃erdʰwós
→
Scottish Gaelic
àrd
(inherited)
→
Manx
ard
(inherited)
→
Old Irish
ard
(inherited)