Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
prostý
←
Polish
prosty
(cognate)
←
Russian
простой
(cognate)
←
Proto-Slavic
*prostъ
(inherited)
→
Czech
sprostý
(prefix)
→
Czech
prostě
(affix)
→
Czech
prostota
(affix)
→
Lower Sorbian
pšosty
(cognate)