Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Silesian
pleca
←
Kashubian
plecë
(cognate)
←
Polish
plecy
(cognate)
←
Proto-Slavic
*pleťè
(inherited)