The Collaborative International Dictionary of English v.0.48:

balked \balked\ adj.
   1. Same as baffled.

   Syn: baffled, discomfited, discouraged, frustrated.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Balk \Balk\, v. t. [imp. & p. p. Balked (b[add]kt); p. pr. &
   vb. n. Balking.] [From Balk a beam; orig. to put a balk
   or beam in one's way, in order to stop or hinder. Cf., for
   sense 2, AS. on balcan legan to lay in heaps.]
   [1913 Webster]
   1. To leave or make balks in. [Obs.] --Gower.
      [1913 Webster]

   2. To leave heaped up; to heap up in piles. [Obs.]
      [1913 Webster]

            Ten thousand bold Scots, two and twenty knights,
            Balk'd in their own blood did Sir Walter see.
                                                  --Shak.
      [1913 Webster]

   3. To omit, miss, or overlook by chance. [Obs.]
      [1913 Webster]

   4. To miss intentionally; to avoid; to shun; to refuse; to
      let go by; to shirk. [Obs. or Obsolescent]
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            By reason of the contagion then in London, we balked
            the inns.                             --Evelyn.
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            Sick he is, and keeps his bed, and balks his meat.
                                                  --Bp. Hall.
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            Nor doth he any creature balk,
            But lays on all he meeteth.           --Drayton.
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   5. To disappoint; to frustrate; to foil; to baffle; to
      thwart; as, to balk expectation.
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            They shall not balk my entrance.      --Byron.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "balked":
   baffled, betrayed, bilked, blasted, blighted, chapfallen,
   crestfallen, crossed, crushed, dashed, defeated, disappointed,
   dished, disillusioned, dissatisfied, foiled, frustrated,
   ill done-by, ill-served, let down, out of countenance, regretful,
   sorely disappointed, soured, thwarted