Trips or loses balance while walking; makes mistakes or moves unsteadily through a task or situation.
From Middle English, possibly of Scandinavian origin, related to Norwegian 'stumla' meaning 'to stumble'. The metaphorical sense of making errors or proceeding awkwardly developed alongside the literal meaning of losing physical balance.
Stumbles perfectly captures that heart-stopping moment when our automatic systems fail us - whether catching a toe on uneven pavement or fumbling through a presentation. Research shows that stumbling triggers the same neurological alarm systems as social embarrassment, explaining why both feel similarly jarring.
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