Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Tocharian A
eṣäk
→
Tocharian B
eṃṣke
(cognate)
→
Tocharian A
eṃṣke
(doublet)