11 letters · 16 points in Scrabble
adjective marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another; - Israel Zangwill; ; - W.M.Thackeray
originEtymology tree English duplicity Proto-Indo-European *h₃ed- Proto-Indo-European *-os Proto-Indo-European *h₃édosder.? Proto-Italic *-ōtsos or *-otsos Latin -ōsus Old French -usbor. Middle English -ous English -ous English duplicitous From duplicity + -ous.
Etymology from Wiktionary, CC BY-SA 3.0