Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
mast
←
Proto-Slavic
*mastь
(inherited)
←
Old Czech
mast
(inherited)
→
Czech
mastný
(suffix)
→
Lower Sorbian
masć
(cognate)