Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
петел
←
Bulgarian
певе́ц
(link)
←
Bulgarian
пева́ч
(link)
←
Bulgarian
пете́лка
(link)
←
Proto-Slavic
*pětьlъ
(inherited)
←
Proto-Slavic
*petьlъ
(inherited)