Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Sikkimese
ཁྱིམ
←
Proto-Sino-Tibetan
*k-jim ~ k-jum
(inherited)
→
Sikkimese
སུ་ཁྱིམ
(compound)