Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
roj
←
Proto-Slavic
*rojь
(inherited)
→
Czech
rojník
(suffix)
→
Czech
rojník
(mention)
→
Lower Sorbian
roj
(cognate)