Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Tocharian B
śak
←
Proto-Indo-European
*déḱm̥
(inherited)
←
Proto-Tocharian
*śäk
(inherited)
←
Tocharian A
śäk
(cognate)
→
Tocharian A
śäk
(cognate)