Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
temný
←
Proto-Slavic
*tьmьnъ
(inherited)
→
Czech
temnota
(affix)
→
Czech
zatemnit
(affix)
→
Lower Sorbian
śamny
(cognate)