विष्

Etymology
Possibly from. Other theories derive the root from.

Root

 * 1) to be active, act, work, do, perform
 * 2) to be quick, speed, run, flow (as water)
 * 3) to work as a servant, serve
 * 4) to have done with, i.e. overcome, subdue, rule
 * 5) to be contained in
 * 6) to clothe
 * 7) to consume, eat