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tr.v. frus·trat·ed, frus·trat·ing, frus·trates
a. To prevent (someone) from accomplishing a purpose or fulfilling a desire; thwart: A persistent wind frustrated me as I tried to rake the leaves.
b. To cause feelings of discouragement, annoyance, or lack of fulfillment in: She was frustrated by his inability to remember her birthday.
2. To prevent from coming to fruition or fulfillment; render ineffectual: frustrated his ambition; frustrated their scheme for reform.
[Middle English frustraten, from Latin frūstrārī, frūstrāt-, from frūstrā, in vain.]
upsetting, difficult, tiring, or annoying
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|Adj.||1.||frustrating - discouraging by hindering|
discouraging - depriving of confidence or hope or enthusiasm and hence often deterring action; "where never is heard a discouraging word"
|2.||frustrating - preventing realization or attainment of a desire|