Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Upper Sorbian
być
←
Lower Sorbian
byś
(cognate)
←
Proto-Indo-European
*bʰuH-
(derived)
←
Proto-Slavic
*byti
(inherited)