Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ukrainian
веселка
←
Belarusian
вясёлка
(cognate)
←
Russian
весёлка
(cognate)
←
Ukrainian
весе́лий
(affix)
←
Ukrainian
-ка
(affix)