verb
impede, hinder, obstruct, clog, hamper, shackle, fetter, spancel, hobble, restrain, check, encumber, cramp, retard, oppose, cumber, incommode, discommode, discompose, thwart, frustrate, circumvent, enchain, bridle, muzzle, gag, pinion, manacle, restrict, bind, tether, tie, handcuff, curb.
Antonyms help*, aid, assist.