DISCOMFIT
upset, discompose, untune, disconcert, discomfit
(verb) cause to lose one’s composure
Source: WordNet® 3.1
Etymology
Verb
discomfit (third-person singular simple present discomfits, present participle discomfitting or discomfiting, simple past and past participle discomfitted or discomfited) (transitive)
(archaic) To defeat completely; to rout.
Synonyms: overthrow, vanquish
(rare) To defeat the plans or hopes of; to frustrate.
Synonyms: foil, thwart
To embarrass greatly; to confuse; to perplex; to disconcert.
Synonyms: abash, disconcert, Thesaurus:abash
Usage notes
While the word is widely used to mean “to embarrass, to disconcert”, prescriptive usage considers this a mistake (confusion with discomfort), and restricts discomfit to meaning “to defeat”. However, Merriam–Webster notes that “[...] the sense "to discomfort or disconcert" has become thoroughly established and is the most prevalent meaning of the word.”
Adjective
discomfit (comparative more discomfit, superlative most discomfit)
(obsolete) Discomfited; overthrown.
Source: Wiktionary
Dis*com"fit, v. t. [imp. & p. p. Discomfited; p. pr. & vb. n.
Discomfiting.] Etym: [OF. desconfit, p. p. of desconfire, F.
déconfire; fr. L. dis- + conficere to make ready, prepare, bring
about. See Comfit, Fact.]
1. To scatter in fight; to put to rout; to defeat.
And his proud foes discomfit in victorious field. Spenser.
2. To break up and frustrate the plans of; to balk
Well, go with me and be not so discomfited. Shak.
Syn.
– To defeat; overthrow; overpower; vanquish; conquer; baffle;
frustrate; confound; discourage.
Dis*com"fit, a.
Definition: Discomfited; overthrown. [Obs.]
Dis*com"fit, n.
Definition: Rout; overthrow; discomfiture.
Such as discomfort as shall quite despoil him. Milton.
Source: Webster’s Unabridged Dictionary 1913 Edition