Where does “சுரம்” come from?

சுரம் (Tamil) comes from Sanskrit स्वर, from Proto-Indo-European swēr- — heavy.

Ancestry of “சுரம்”, step by step

StepLanguageWordMeaning
1Sanskritस्वरsound, noise; voice; a note
2Proto-Indo-Europeanswēr-heavy
Every word from Proto-Indo-European swēr- →Every word from Sanskrit स्वर →