Where does “ప్రసాదించు” come from?

ప్రసాదించు (Telugu) comes from Sanskrit प्रसाद, from Sanskrit प्रसद्, from Sanskrit सद्, from Proto-Indo-European sḗd- — to sit.

ప్రసాదించు (Telugu): To favour

Definitions

Step	Language	Word	Meaning
1	Sanskrit	प्रसाद	clearness, brightness, pellucidness, purity;...
2	Sanskrit	प्रसद्	to fall into the power of
3	Sanskrit	सद्	to sit down
4	Proto-Indo-European	sḗd-	to sit