Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Tibetan
འཐུང
←
Proto-Sino-Tibetan
*N/s-tuŋ
(inherited)
→
Tibetan
འཐུང་ཡག
(compound)