Tending to cause dissatisfaction, annoyance, or discontent; frustrating or upsetting.
Present participle of disgruntle, used as an adjective. The -ing form can modify nouns to describe their quality of causing disgruntlement.
A 'disgruntling' experience sticks with you differently than a 'disgusting' one—it builds resentment over time rather than creating immediate revulsion, making it a more insidious kind of bad.
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