frustrate Synonyms

baffle foil thwart torment defeat queer scotch bilk bedevil spoil crucify cross hamstring halt forestall hamper forestalling disgruntle dishearten disillusion disrupt dissatisfy dun dunning elude embitter hinder impede hold up foul up to balk wreck undo sabotage stop obstruct scuttle scupper ruin retard rag quash prevent inhibit stymie disenchant countervail counterplot countercheck counteract