v. 25B6; verb HAMPER, obstruct, impede, inhibit, retard, baulk, thwart, foil, curb, delay, arrest, interfere with, set back, slow down, hold back, hold up, stop, halt; restrict, restrain, constrain, block, check, curtail, frustrate, cramp, handicap, cripple, hamstring; Brit. throw a spanner in the works; informal stymie.
facilitate.