¹foil

frustrate, thwart, foil, baffle, balk mean to check or defeat another's plan or block achievement of a goal. frustrate implies making vain or ineffectual all efforts however vigorous or persistent <frustrated attempts at government reform>. thwart suggests frustration or checking by crossing or opposing <the army thwarted his attempt at a coup>. foil implies checking or defeating so as to discourage further effort <foiled by her parents, he stopped trying to see her>. baffle implies frustration by confusing or puzzling <baffled by the maze of rules and regulations>. balk suggests the interposing of obstacles or hindrances <officials felt that legal restrictions had balked their efforts to control crime>.