afterthought arch dam backstop bamboo curtain bank bar barrage barrier bear-trap dam beaver dam bind block blockage boom breakwater breastwork brick wall buffer bulkhead bulwark bureaucratic delay cofferdam dam defense delay delayage delayed reaction detention dike ditch double take dragging earthwork embankment fence gate gravity dam groin halt hang-up hindrance holdup hydraulic-fill dam interim iron curtain jam jetty lag lagging leaping weir levee milldam moat mole moratorium mound obstruction paperasserie parapet pause portcullis rampart red tape red-tapeism red-tapery reprieve respite retardance retardation roadblock rock-fill dam seawall shutter dam slow-up slowdown slowness stay stay of execution stone wall stop stoppage suspension tie-up time lag wait wall weir wicket dam work