Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Kannada
ಏಳು
←
Proto-Dravidian
*ēr̤u
(inherited)
←
Tamil
ஏழு
(cognate)
→
Tamil
ஏழு
(cognate)