Disconcerting

from WordNet (r) 3.0 (2006)
disconcerting
    adj 1: causing an emotional disturbance; "his disconcerting
           habit of greeting friends ferociously and strangers
           charmingly"- Herb Caen; "an upsetting experience" [syn:
           {disconcerting}, {upsetting}]
    
from The Collaborative International Dictionary of English v.0.48
Disconcert \Dis`con*cert"\, v. t. [imp. & p. p. {Disconcerted};
   p. pr. & vb. n. {Disconcerting}.] [Pref. dis- + concert: cf.
   OF. desconcerter, F. d['e]concerter.]
   1. To break up the harmonious progress of; to throw into
      disorder or confusion; as, the emperor disconcerted the
      plans of his enemy.
      [1913 Webster]

   2. To confuse the faculties of; to disturb the composure of;
      to discompose; to abash.
      [1913 Webster]

            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.
        [1913 Webster]
    
from The Collaborative International Dictionary of English v.0.48
disconcerting \disconcerting\ adj.
   hard to deal with; causing uncertainty or confusion about how
   to act or react.

   Syn: awkward, embarrassing, off-putting, sticky, tight,
        unenviable.
        [WordNet 1.5]
    
from Moby Thesaurus II by Grady Ward, 1.0
44 Moby Thesaurus words for "disconcerting":
      alarming, awing, awkward, baffling, bewildering, bothering,
      chilling, confounding, confusing, crushing, daunting, defeating,
      deterrent, deterring, discomposing, discouraging, disheartening,
      dismaying, disquieting, distracting, disturbing, embarrassing,
      enigmatic, fear-inspiring, fearful, fearsome, frightening,
      frightful, frustrating, humiliating, intricate, mortifying,
      mysterious, mystifying, overawing, perplexing, perturbing,
      problematic, puzzling, scaring, scary, startling, unsettling,
      upsetting

    

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