Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Tamil
அச்சன்
←
Malayalam
അച്ഛന്
(cognate)
←
Maharastri Prakrit
𑀅𑀚𑁆𑀚
(derived)
←
Sanskrit
आर्य
(derived)
←
Tamil
அச்ச
(suffix)
←
Tamil
ன்
(suffix)