Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
ве́ко
→
Belarusian
павека
(cognate)
→
Hungarian
véka
(cognate)
→
Lithuanian
vokas
(cognate)
→
Latvian
vāks
(cognate)