Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ukrainian
вівторок
←
Old East Slavic
въ-
(prefix)
←
Old East Slavic
вторъкъ
(prefix)
←
Proto-Slavic
*vъtorъkъ
(inherited)