Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
věc
←
Proto-Indo-European
*wekʷ-
(derived)
←
Proto-Slavic
*veťь
(inherited)
→
Czech
věcný
(affix)
→
Lower Sorbian
wěc
(cognate)