Disconcert

v. t.	1.	To break up the harmonious progress of; to throw into disorder or confusion; as, the emperor disconcerted the plans of his enemy. [imp. & p. p. Disconcerted; p. pr. & vb. n. Disconcerting.]
	2.	To confuse the faculties of; to disturb the composure of; to discompose; to abash. The embrace disconcerted the daughter-in-law somewhat, as the caresses of old gentlemen unshorn and perfumed with tobacco might well do. - Thackeray.
n.	1.	Want of concert; disagreement.

Verb	1.	disconcert - cause to feel embarrassment; "The constant attention of the young man confused her" Synonyms: flurry, confuse, put off
	2.	disconcert - cause to lose one's composure Synonyms: discomfit, discompose, untune, upset

abash, addle, addle the wits, agitate, appall, astound, baffle, balk, ball up, becloud, bedazzle, befuddle, bewilder, blast, bother, brave, bug, cast down, chagrin, challenge, checkmate, circumvent, cloud, confound, confront, confuse, contravene, counter, counteract, countermand, counterwork, cross, dash, daze, dazzle, defeat, defy, destroy, discombobulate, discomfit, discompose, discountenance, dish, dismay, disorganize, disorient, disquiet, disrupt, disturb, electrify, elude, embarrass, entangle, faze, flummox, flurry, fluster, flutter, fog, foil, frustrate, fuddle, fuss, humiliate, jar, jolt, knock the chocks, maze, mist, mix up, moider, mortify, muddle, nonplus, perplex, perturb, pother, put out, puzzle, raise hell, rattle, rock, ruffle, ruin, sabotage, scotch, shake, shake up, shock, spike, spoil, stagger, stir, stonewall, stump, take aback, throw into confusion, thwart, trouble, unsettle, upset