Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Tamil
அரை
→
Tamil
அரைகல்
(compound)
→
Tamil
அரைக்கச்சு
(affix)
→
Telugu
అర
(cognate)