disconcert

upset the self-possession of 
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Disconcert

Dis`con·cert' transitive verb [ imperfect & past participle Disconcerted ; present participle & verbal noun Disconcerting .] [ Prefix dis- + concert : confer Old French desconcerter , French déconcerter .] ...
Found on http://www.encyclo.co.uk/webster/D/78

Disconcert

• (v. t.) To confuse the faculties of; to disturb the composure of; to discompose; to abash. • (n.) Want of concert; disagreement. • (v. t.) To break up the harmonious progress of; to throw into disorder or confusion; as, the emperor disconcerted the plans of his enemy.
Found on http://thinkexist.com/dictionary/meaning/disconcert/

disconcert

cause to lose one's composure
Found on https://www.vocabulary.com/lists/52473

disconcert

cause to lose one's composure
Found on https://www.vocabulary.com/lists/51739
No exact match found