Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Lower Sorbian
stwórtk
←
Lower Sorbian
stwórty
(suffix)
←
Lower Sorbian
k
(suffix)
←
Proto-Slavic
*četvьrtъkъ
(inherited)