having self-possession upset; thrown into confusion; "the hecklers pelted the discombobulated speaker with anything that came to hand"; "looked at each other dumbly, quite disconcerted"- G B Shaw
If something disconcerts you, it makes you feel anxious, confused, or embarrassed. Antony's wry smile disconcerted Sutcliffe + disconcerted dis·con·cert·ed He was disconcerted to find his fellow diners already seated. to make someone feel slightly confused, embarrassed, or worried (desconcerter, from concerter )