Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
wieko
←
Proto-Slavic
*vě̀ko
(inherited)
→
Latvian
vāks
(cognate)
→
Polish
wieczko
(suffix)