disconcerting (adj) - causing to feel unsettled, uncomfortable, or worried [dis-kuhn-sur-ting]
BREAKDOWN: DIS- (against) + CON- (with) + CERT- (to strive) + -ING (act or state)
disconcert means to disturb the composure of; to confuse or throw into disorder
See also: ascertain, discernment
“Never forget the power of silence, that massively disconcerting pause which goes on and on and may at last induce an opponent to babble and backtrack nervously.” —Lance Morrow