D defs.my
Entry 3 senses · 2 variants Webster, 1913

Frustrate

/frŭs'-trātˌ/ · Frus·trate · IPA /ˈfɹʌsˌtɹeɪt/
01 a. Vain; ineffectual; useless; unprofitable; null; voil; nugatory; of no effect.
  1. 1.
    Vain; ineffectual; useless; unprofitable; null; voil; nugatory; of no effect.
02 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;…
imp. & p. p. Frustrated; p. pr. & vb. n. Frustrating
  1. 1.
    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.
    “Shall the adversary thus obtain His end and frustrate thine ?” Milton.
  2. 2.
    To make null; to nullifly; to render invalid or of no effect; as, to frustrate a conveyance or deed.
Syn. To balk; thwart; foil; baffle; defeat.