Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Tocharian B
ārsk-
←
Proto-Tocharian
*ār-
(derived)
←
Proto-Tocharian
*-sk-
(affix)
←
Tocharian B
ār-
(mention)