#1
frustrate v. [
thwart, queer, spoil, scotch, foil, cross, baffle, bilk] hinder or prevent (the efforts, plans, or desires) of; "What ultimately frustrated every challenger was Ruth's amazing September surge"; "foil your opponent"
. wn #2
frustrate v. [
torment, rag, bedevil, crucify, dun] treat cruelly; "The children tormented the stuttering teacher"
. wn