(n.) The act of frustrating; disappointment; defeat; as, the frustration of one's designs

ambivalence ambivalence of impulse annulment bafflement balk balking betrayed hope blasted expectation blighted hope blow buck-passing buffet cancellation check checkmate circumvention comedown conflict confounding confusion counterbalancing cruel disappointment dash dashed hope decompensation defeat disappointment discomfiture disconcertion disillusionment dissatisfaction elusion emotional shock evasion external frustration failure fallen countenance fiasco fizzle foil foiling forlorn hope getting around getting round hope deferred invalidation letdown mental shock mirage neutralization nullification offsetting outguessing outmaneuvering outwitting passing the buck psychological stress rebuff repulse reversal reverse rout setback sore disappointment stress tantalization tease the runaround the slip thwarting trauma traumatism undoing upset vitiation voiding