Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Tamil
அப்பொழுது
←
Proto-Dravidian
*a-
(derived)
←
Tamil
அ
(compound)
←
Tamil
பொழுது
(compound)