Third person singular present tense of 'flesh'; to clothe in flesh, give substance to an idea, or fill out something previously sketchy.
From Old English 'flæsc' (flesh, meat, body). The verb developed from the noun through semantic broadening—from the physical act of clothing in flesh to the metaphorical act of giving substance to abstract things.
Shakespeare used 'flesh' this way constantly—when a character gives details about something vague, they're literally 'fleshing it out,' turning bare words into vivid reality!
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