1. (v.) To put a barrier before; to prevent; to hinder\; to stop; to impede.

2. (v.) To shut out by anticipative action; to prevent or hinder by necessary consequence or implication; to deter action of, access to, employment of, etc.; to render ineffectual; to obviate by anticipation.

anticipate avert avoid ban bar bar out block blockade cease check count out cut off debar deflect deny deter disallow discontinue discourage dishearten embargo enjoin estop exclude exclude from fend fend off forbid foreclose forestall freeze out frustrate help hinder ignore impede inhibit interdict interfere with keep from keep off keep out leave out lock out obstruct obviate omit ostracize outlaw pass over prevent prohibit proscribe quit refuse reject relegate repel repress repudiate rule out save say no to send to Coventry shut out stave off stop suppress taboo thwart turn aside ward ward off