Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
поло́н
→
Latvian
pelnīt
(cognate)
→
Russian
плен
(doublet)
→
Russian
полонянин
(affix)
→
Russian
полонить
(affix)