causing an emotional disturbance; "his disconcerting habit of greeting friends ferociously and strangers charmingly"- Herb Caen; "an upsetting experience
If you say that something is disconcerting, you mean that it makes you feel anxious, confused, or embarrassed. The reception desk is not at street level, which is a little disconcerting. + disconcertingly dis·con·cert·ing·ly She looks disconcertingly like a familiar aunt or grandmother. making you feel slightly confused, embarrassed, or worried
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 )