Where does “పాత్ర” come from?

పాత్ర (Telugu) comes from Sanskrit पात्र, from Proto-Indo-European peh₃- — to drink.

పాత్ర (Telugu): Vessel in general; A utensil

Definitions

Step	Language	Word	Meaning
1	Sanskrit	पात्र	a drinking vessel, goblet, bowl, cup, dish, pot,...
2	Proto-Indo-European	peh₃-	to drink

పాత్ర — Etymology, Origin & Word History | Etymology Explorer