Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
čistý
←
Proto-Slavic
*čistъ
(inherited)
→
Czech
čistota
(affix)
→
Czech
čistokrevný
(affix)
→
Lower Sorbian
cysty
(cognate)
→
Latvian
šķīsts
(cognate)