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