"frustration" in the noun sense
1. frustration, defeat
the feeling that accompanies an experience of being thwarted in attaining your goals
2. frustration, thwarting, foiling
an act of hindering someone's plans or efforts
3. frustration
a feeling of annoyance at being hindered or criticized
"her constant complaints were the main source of his frustration"
Source: WordNet® (An amazing lexical database of English)
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