Similar word to back-water:

abate, anchor it, back-water, bog down, brake, check, choke, curb, curtail, cut back, cut down, decelerate, decrease, detain, diminish, ease off, ease up, embog, handicap, hinder, hit the brakes, hold back, hold up, impede, keep waiting, lag, lessen, let down flaps, loiter, lose speed, lose steam, mire, moderate, postpone, procrastinate, qualify, quiet, reduce, reduce speed, reef, regulate, rein in, relax, retard, retardate, set back, slacken, stall, stunt, temper, wind down


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