frus ‧ trate /frʌˈstreɪt $ ˈfrʌstreɪt/ BrE AmE verb [transitive]
[ Date: 1400-1500 ; Language: Latin ; Origin: frustrare , from frustra 'without effect' ]
1 . if something frustrates you, it makes you feel annoyed or angry because you are unable to do what you want:
The fact that he’s working with amateurs really frustrates him.
2 . [usually passive] to prevent someone’s plans, efforts, or attempts from succeeding SYN foil :
Their attempts to speak to him were frustrated by the guards.