The quality or state of being gauche; social awkwardness, tactlessness, or lack of refinement and grace.
From 'gauche' (French for clumsy/left) plus English '-ness' suffix to form an abstract noun describing a quality or condition.
Abstract nouns with '-ness' are so common we barely notice them—'happiness,' 'sadness,' 'gaucheness'—but they're a Germanic feature that makes English brilliantly flexible at naming emotions and qualities.
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