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frustrate  (frustrates 3rd person present) (frustrating present participle) (frustrated past tense & past participle )
1  verb If something frustrates you, it upsets or angers you because you are unable to do anything about the problems it creates. 
These questions frustrated me...  V n 
Doesn't it frustrate you that audiences in the theatre are so restricted?  V n 
 frustrated    adj usu v-link ADJ 
Roberta felt frustrated and angry., ...voters who are frustrated with the council.  
 frustration  (frustrations plural) n-var 
The results show the level of frustration among hospital doctors., ...a man fed up with the frustrations of everyday life.  
2  verb If someone or something frustrates a plan or attempt to do something, they prevent it from succeeding. 
The government has deliberately frustrated his efforts to gain work permits for his foreign staff.  V n 
...her frustrated attempt to become governor.  V-ed