or its water sinks deep into the ground, so that thou wilt never be able to find it again!"

"Or the water of the garden will run off underground so that thou wilt never be able to find it."

Or some morning the water thereof will be lost in the earth so that thou canst not make search for it.

Or its water will sink down into the ground, so that thou art unable to find it.

Or its water will become sunken [into the earth], so you would never be able to seek it."