Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Tocharian A
āriñc
←
Proto-Tocharian
*āräñce
(inherited)
←
Tocharian B
arañce
(cognate)
→
Welsh
aren
(cognate)
→
Old Irish
áru
(cognate)
→
Tocharian B
arañce
(cognate)