Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
рехнуться
←
Bulgarian
ре́хам се
(cognate)
←
Russian
рёха
(affix)
←
Russian
-ну́ть
(affix)
←
Russian
-ся
(affix)