Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
areca
←
Proto-Dravidian
*aṭ-ay-kkāy
(derived)
←
Malayalam
അടയ്ക്ക
(derived)