Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Indo-European
*nh₁trih₂
→
Breton
naer
(inherited)
→
Welsh
neidr
(inherited)
→
Irish
nathair
(inherited)
→
Scottish Gaelic
nathair
(inherited)