Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
jasno
←
Proto-Slavic
*ěsno
(link)
←
Proto-Slavic
*ěsno nebo
(link)
→
Czech
zčistajasna
(mention)