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.