a. [ L. frustratus, p. p. of frustrare, frustrari, to deceive, frustrate, fr. frustra in vain, witout effect, in erorr, prob. for frudtra and akin to fraus, E. fraud. ] Vain; ineffectual; useless; unprofitable; null; voil; nugatory; of no effect. “Our frustrate search.” Shak. [ 1913 Webster ]
v. t.
Shall the adversary thus obtain
His end and frustrate thine ? Milton. [ 1913 Webster ]
adv. In vain. [ Obs. ] Vicars. [ 1913 Webster ]