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The Collaborative International Dictionary
Unplume

Unplume \Un*plume"\, v. t. [1st pref. un- + plume.] To strip of plumes or feathers; hence, to humiliate.

Wiktionary
unplume

vb. 1 (context transitive English) To strip of plumes or feathers. 2 (context transitive by extension English) To humiliate.