Having flat feet with fallen arches; also meaning unprepared, clumsy, or caught off guard, as in 'caught flat-footed.'
Compound adjective of 'flat' and 'footed,' combining the medical condition with its metaphorical extensions. The figurative meaning developed in the 19th century from the literal condition suggesting clumsiness.
The phrase 'caught flat-footed' originally meant someone stood awkwardly due to fallen arches, but it evolved to mean being unprepared or surprised—our language often borrows physical descriptions for emotional states!
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