The water held back by a dam or other obstruction

(idiomatic) A remote place; somewhere that remains unaffected by new events, progresses, ideas, etc.

A rowing stroke in which the oar is pushed forward to stop the boat; see back water

(paper industry) Water used in the papermaking process. Recycled to reduce usage of fresh water, and usually containing residual amounts of chemicals and fibres.

To row or paddle a backwater stroke.

(idiomatic) To vacillate on a long-held position.