/ frʌˈstreɪt; NAmE ˈfrʌstreɪt/ verb [ vn ]
1.
to make sb feel annoyed or impatient because they cannot do or achieve what they want :
What frustrates him is that there's too little money to spend on the project.
2.
to prevent sb from doing sth; to prevent sth from happening or succeeding
SYN thwart :
The rescue attempt was frustrated by bad weather.
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WORD ORIGIN
late Middle English : from Latin frustrat- disappointed, from the verb frustrare , from frustra in vain.