obstacle, handicap, obstruction, hindrance, interrupt, impediment

barrier, lock, inhibition, interrupt, stonewalling, interruption

barricade, check, holdback, stopping, stoppage, interrupt

interruption, interrupt

interrupt, impede, hamper, baulk, trammel, prevent

stop, clog, inhibit, prevent, fend, interrupt

punctuate, interrupt, put in

interrupt, invert, derange