DISCONCERT
upset, discompose, untune, disconcert, discomfit
(verb) cause to lose one’s composure
confuse, flurry, disconcert, put off
(verb) cause to feel embarrassment; “The constant attention of the young man confused her”
Source: WordNet® 3.1
Etymology
Verb
disconcert (third-person singular simple present disconcerts, present participle disconcerting, simple past and past participle disconcerted)
(transitive) To upset the composure of.
(transitive) To bring into confusion.
(transitive) To frustrate, make go wrong.
Synonyms
• agitate
• upset
• See also confuse
Noun
disconcert
A state of disunion.
Source: Wiktionary
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