Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Sanskrit
चेतस्
←
Proto-Indo-Iranian
*čáytas
(inherited)
←
Proto-Indo-Aryan
*ćáytas
(inherited)
←
Proto-Indo-European
(inherited)
←
Proto-Indo-European
*kʷeyt-
(mention)
→
Bengali
চেত
(derived)
→
Sanskrit
प्रचेतस्
(prefix)