Synonyms for Frustrate (same or very similar meaning)
WordNet sense 1 (hinder or prevent (the efforts, plans, or desires) of):
baffle, bilk, cross, foil, scotch, spoil, thwartWordNet sense 2 (treat cruelly):
bedevil, crucify, dun, rag, torment, tormentFrom the ODE community, based on WordNetadd/edit