Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
on
←
Proto-Indo-European
*h₁ónos
(inherited)
←
Proto-Slavic
*onъ
(inherited)
←
Old Czech
on
(inherited)