disconcert

From Middle French desconcerter, from des- (“dis-”) + concerter (“to bring into agreement, organize”).

• (Received Pronunciation) IPA^(key): /ˌdɪskənˈsɜːt/
• (General American) IPA^(key): /ˌdɪskənˈsɝt/

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disconcert (third-person singular simple present disconcerts, present participle disconcerting, simple past and past participle disconcerted)

1. (transitive) To upset the composure of; to startle.

   Synonyms: disturb, unsettle, rattle; see also Thesaurus:upset

   • 1847 January – 1848 July, William Makepeace Thackeray, chapter 4, in Vanity Fair […], London: Bradbury and Evans […], published 1848, →OCLC:

     The embrace disconcerted the daughter-in-law somewhat, as the caresses of old gentlemen unshorn and perfumed with tobacco might well do.

2. (transitive) To bring into confusion.

   Synonyms: agitate, upset, rattle; see also Thesaurus:confuse

3. (transitive) To frustrate, discomfit.

   Synonyms: foil, thwart

   The emperor disconcerted the plans of his enemy.

disconcert

1. A state of disunion.