Where does “तत्सम” come from?

तत्सम (Sanskrit) comes from Sanskrit सम, from Proto-Indo-Iranian samHás, from Proto-Indo-European somHós, from Proto-Indo-European sem- — together, one.

Ancestry of “तत्सम”, step by step

Step	Language	Word	Meaning
1	Sanskrit	सम	same, equal, alike; equivalent to, like,...
2	Proto-Indo-Iranian	samHás	—
3	Proto-Indo-European	somHós	same, alike
4	Proto-Indo-European	sem-	together, one

Words derived from “तत्सम”

tatsama
अर्धतत्सम
तत्सम

Every word from Proto-Indo-European sem- →

तत्सम — Etymology, Origin & Word History | Etymology Explorer