Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Lower Sorbian
žni
←
Czech
žeň
(cognate)
←
Upper Sorbian
žně
(cognate)
←
Polish
żniwa
(cognate)
←
Proto-Slavic
*žьnъ
(inherited)