The story
- Proto-Indo-European · derived from*ten-tlo- /*tn̥-tlo-
- Sanskrit · borrowed fromतन्त्र
- English todaytantra
From Sanskrit तन्त्र (tantra), from Proto-Indo-European *ten-tlo- /*tn̥-tlo-, from *ten- (“to stretch, extend”) with the suffix *-tlom denoting instruments. Doublet of tar (“string instrument”).
Etymology from Wiktionary, CC BY-SA 4.0.