Definition of pluck up
1 : to assume an appearance of : bring to the fore : summon plucked his nerve up to demand an explanation
2 : to eradicate by or as if by tearing up by the roots
: to assume an appearance (as of valor) especially in response to a particular stress
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Origin and Etymology of pluck up
Middle English plucken up, from plucken to pluck + up, adverb
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