v. & adj.
--v.tr.
1. make (efforts) ineffective.
2 prevent (a person) from achieving a purpose.
3 (as frustrated adj.) a discontented because unable to achieve one's desire. b sexually unfulfilled.
4 disappoint (a hope).
--adj. archaic frustrated.
Derivatives:
frustratedly adv. frustrater n. frustrating adj. frustratingly adv. frustration n.
Etymology: ME f. L frustrari frustrat- f. frustra in vain