Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
těžký
←
Proto-Slavic
*tęžьkъ
(inherited)
→
Czech
těžiště
(suffix)
→
Czech
krušný
(link)
→
Silesian
ciynżki
(cognate)