Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
ключ
←
Proto-Slavic
*kľučь
(inherited)
→
Bulgarian
-алка
(link)
→
Bulgarian
ключалка
(affix)
→
Albanian
kyç
(cognate)