Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
кос
←
Bulgarian
кобе́ц
(cognate)
←
Bulgarian
копа́я
(link)
←
Bulgarian
ко́пам
(link)
←
Bulgarian
копа́ч
(link)
←
Bulgarian
ко́свен
(link)
←
Proto-Slavic
*kosъ
(inherited)
←
Proto-Slavic
*kosъ
(inherited)
→
Bulgarian
коса
(link)
→
Bulgarian
косер
(affix)