In a frustrated manner; with frustration or disappointment; while being thwarted or hindered.
From 'frustrate' plus -ly suffix to form an adverb. This follows standard English adverb formation, though 'frustratedly' or 'in frustration' are more commonly used.
We have 'frustratedly,' 'frustratingly,' and technically 'frustrately'—English gives us multiple ways to express the same idea, which is why our language feels so flexible!
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