Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
chomąto
←
Proto-Slavic
*xomǫtъ
(inherited)
→
German
Kummet
(cognate)
→
Polish
chomątko
(affix)