strainer n.— «Sweepers—clumps of branches or roots that hang out over the water or jut up out of it—are to be avoided. They are dangerous. The current can pin a person against them. In a worst-case scenario, sweepers can push a person...
sweeper n.— «Trees reaching out over the flow—”sweepers” in river parlance—are the dread of all whitewater paddlers, whether in a canoe, a kayak or a raft.» —“The river is wet and wild, yet safety is canoe club’s No. 1...