Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*svojakъ
→
Lower Sorbian
swak
(inherited)
→
Polish
swak
(derived)
→
Polish
swojak
(derived)
→
Serbo-Croatian
svak
(mention)
→
Serbo-Croatian
svast
(mention)