Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old East Slavic
дьньсь
←
Proto-Slavic
*dьnьsь
(inherited)
←
Proto-Slavic
*dьnь
(mention)
←
Proto-Slavic
*sь
(mention)
→
Russian
днесь
(inherited)