Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Tocharian A
ārt-
←
Proto-Indo-European
(derived)
←
Proto-Indo-European
*h₂er-
(mention)
←
Proto-Tocharian
*ārtw-
(inherited)
←
Tocharian B
ārtt-
(cognate)
→
Tocharian B
ārtt-
(cognate)
→
Tocharian A
ārt
(mention)