frustrate

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

queer scotch thwart baffle bilk foil cross spoil bedevil dun rag crucify torment

frustrated