Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
пятно
←
Old East Slavic
пятьно
(inherited)
←
Proto-Slavic
*pętьno
(inherited)
←
Proto-Slavic
*pęta
(mention)