bar, barrier, blank, blank wall, blind, blind alley, blind gut, blind-alley, block, blockade, blockage, bottleneck, box, cecal, cecum, choked, choked off, choking, choking off, clog, closed, congestion, constipation, constricted, contracted, corner, costiveness, cul-de-sac, dead, dead-end street, deadlock, embolism, embolus, extremity, gorge, halt, hole, impasse, impediment, infarct, infarction, jam, obstacle, obstipation, obstruction, pocket, sealing off, shut, squeezed shut, stalemate, stand, standstill, stop, stoppage, strangulated, strangulation, unopen, unopened, unvented, unventilated