obsolete French disconcerter, alteration of Middle French desconcerter, from des- dis- + concerter to concert
verb
to throw into confusion
to disturb the composure of
disconcerting their plans
embarrassdiscomfitabashdisconcertrattle mean to distress by confusing or confounding. embarrass implies some influence that impedes thought, speech, or action. discomfit implies a hampering or frustrating accompanied by confusion.