Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
teď
←
Proto-Indo-European
*to-
(derived)
←
Proto-Slavic
*tъdě
(inherited)
←
Proto-Slavic
*tъ
(mention)
←
Proto-Slavic
*-dě
(mention)