frustration, thwarting, foiling -- (an act of hindering someone's plans or efforts)
Overview of verb foil
The verb foil has 3 senses
foil -- (enhance by contrast; "In this picture, the figures are foiled against the background")
thwart, queer, spoil, scotch, foil, cross, frustrate, 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")