backwater
back.wa.ter \-.wo.t-*r, -.wa:t-\ n 1a: water turned back in its course by an obstruction, an opposing current, or the tide 1b: a body of water turned back 2: an isolated backward place
Webster's English Dictionaryback.wa.ter \-.wo.t-*r, -.wa:t-\ n 1a: water turned back in its course by an obstruction, an opposing current, or the tide 1b: a body of water turned back 2: an isolated backward place