a. | 1. | Conceited; assuming; |
2. | such as to disturb the self-possession of; unnerving; causing mental distress; |
Adj. | 1. | upsetting - causing an emotional disturbance; "his disconcerting habit of greeting friends ferociously and strangers charmingly"- Herb Caen; "an upsetting experience" Synonyms: disconcerting |