— frustrater , n. — frustratingly , adv. — frustrative /frus"tray tiv, -treuh-/ , adj.
/frus"trayt/ , v. , frustrated, frustrating , adj.
v.t.
1. to make (plans, efforts, etc.) worthless or of no avail; defeat; nullify: The student's indifference frustrated the teacher's efforts to help him.
2. to disappoint or thwart (a person): a talented woman whom life had frustrated.
v.i.
3. to become frustrated: His trouble is that he frustrates much too easily.
adj.
4. frustrated.
[ 1400-50; late ME frustratus, ptp. of frustrari, v. deriv. of frustra in vain ]
Syn. 1. balk, foil, circumvent. See thwart .