Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
třeba
←
Polish
trzeba
(cognate)
←
Russian
тре́ба
(cognate)
←
Slovak
treba
(cognate)
←
Proto-Slavic
*terba
(inherited)
→
Czech
potřeba
(prefix)
→
Slovak
treba
(cognate)