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Frustrate (a.) Vain; ineffectual; useless; unprofitable; null; voil; nugatory; of no effect.
Frustrate (v. t.) To bring to nothing; to prevent from attaining a purpose; to disappoint; to defeat; to baffle; as, to frustrate a plan, design, or attempt; to frustrate the will or purpose.
Frustrate (v. t.) To make null; to nullifly; to render invalid or of no effect; as, to frustrate a conveyance or deed.