In a way that shows anxiety, worry, or a lack of confidence; with tension or apprehension.
From 'nervous,' which comes from Latin 'nervosus' (sinewy, vigorous). Originally referred to physical strength in the nerves, then shifted to mean emotionally tense or anxious.
The word started meaning physically strong through your nerves—'sinewy'—but gradually shifted to mean the opposite: when you're nervous, your muscles tense up but you feel weak! Language captured how anxiety makes your body feel conflicted.
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