obstruct

[1]	block , blockade , block , bar , check , hinder , stymie , prevent , stop (up) , stymy , embarrass , arrest , halt , clog , make impassable , bring to a standstill
[2]	hamper , obturate , impede , slow , impede , occlude , jam , interfere with , retard , block , close up , hinder , interrupt , delay , stay , stall
[3]	preclude , block , prevent , debar , block , prohibit , forbid , stop , stand in the way of