Answer:
A morbidlyยญ-named body of water
What is neither inside the house nor outside the house but a necessity for any home?
A serpent swam in a silver urn, A golden bird did in its mouth abide, The serpent drank the water, this in turn, Killed the serpent. Then the gold bird died.
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
What covers its face with its hands, speaks no language, yet most known what it's saying?