Feelings of being annoyed, disappointed, or unable to achieve something you want.
From Latin 'frustrari' (to deceive/disappoint), possibly from 'frustra' (in vain). The word entered English in the 15th century and has kept its core meaning of thwarted desires.
Frustration literally comes from being 'frustrated' or deceived—you expected something to work out and it didn't, which is more specific than just being upset; it's upset plus disappointment.
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