Where does “तन्त्रवाय” come from?

तन्त्रवाय (Sanskrit) comes from Sanskrit तन्त्र, from Proto-Indo-Iranian tántram, from Proto-Indo-European *tántram, from Proto-Indo-European ten- — to stretch, to extend.

Ancestry of “तन्त्रवाय”, step by step

StepLanguageWordMeaning
1Sanskritतन्त्रa loom; the warp; the leading or principal or...
2Proto-Indo-Iraniantántram—
3Proto-Indo-European*tántram—
4Proto-Indo-Europeanten-to stretch, to extend
Every word from Proto-Indo-European ten- →Every word from Proto-Indo-European *tántram →Every word from Proto-Indo-Iranian tántram →