frustrate

verbs

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