Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Upper Sorbian
serp
←
Proto-Slavic
*sьrpъ
(inherited)
→
Lower Sorbian
serp
(cognate)
→
Latvian
sirpis
(cognate)