Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
wojak
←
Czech
voják
(cognate)
←
Slovak
vojak
(cognate)
→
Czech
voják
(cognate)
→
Lower Sorbian
wójak
(cognate)
→
Slovak
vojak
(cognate)