Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
pomoc
←
Proto-Slavic
*pomoťь
(inherited)
→
Czech
pomocný
(affix)
→
Czech
pomocník
(suffix)
→
Czech
pomůcka
(affix)
→
Lower Sorbian
pomoc
(cognate)