DISCONCERTING
disconcerting, upsetting
(adjective) causing an emotional disturbance; “his disconcerting habit of greeting friends ferociously and strangers charmingly”- Herb Caen; “an upsetting experience”
Source: WordNet® 3.1
Adjective
disconcerting (comparative more disconcerting, superlative most disconcerting)
Tending to cause discomfort, uneasiness or alarm.
Synonyms: unsettling, troubling, upsetting
Source: Wiktionary
DISCONCERT
Dis`con*cert", v. t. [imp. & p. p. Disconcerted; p. pr. & vb. n.
Disconcerting.] Etym: [Pref. dis- + concert: cf. OF. desconcerter, F.
déconcerter.]
1. To break up the harmonious progress of; to throw into disorder or
confusion; as, the emperor disconcerted the plans of his enemy.
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.
Syn.
– To discompose; derange; ruffle; confuse; disturb; defeat;
frustrate.
Dis`con*cert", n.
Definition: Want of concert; disagreement. Sir W. Temple.
Source: Webster’s Unabridged Dictionary 1913 Edition