Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ottoman Turkish
اون
←
Proto-Turkic
*ōn
(inherited)
←
Proto-Turkic
*hūn
(inherited)
→
Ottoman Turkish
سكسان
(compound)
→
Turkish
on
(inherited)