Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Lower Sorbian
kócka
←
Lower Sorbian
kóca
(suffix)
←
Lower Sorbian
ka
(suffix)
←
Upper Sorbian
kóčka
(cognate)