The Collaborative International Dictionary of English v.0.48:

Confound \Con*found"\ (k[o^]n*found"), v. t. [imp. & p. p.
   Confounded; p. pr. & vb. n. Confounding.] [F. confondre,
   fr. L. confundere, -fusum, to pour together; con- + fundere
   to pour. See Fuse to melt, and cf. Confuse.]
   1. To mingle and blend, so that different elements can not be
      distinguished; to confuse.
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            They who strip not ideas from the marks men use for
            them, but confound them with words, must have
            endless dispute.                      --Locke.
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            Let us go down, and there confound their language.
                                                  --Gen. xi. 7.
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   2. To mistake for another; to identify falsely.
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            They [the tinkers] were generally vagrants and
            pilferers, and were often confounded with the
            gypsies.                              --Macaulay.
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   3. To throw into confusion or disorder; to perplex; to strike
      with amazement; to dismay.
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            The gods confound...
            The Athenians both within and out that wall. --Shak.
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            They trusted in thee and were not confounded. --Ps.
                                                  xxii. 5.
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            So spake the Son of God, and Satan stood
            A while as mute, confounded what to say. --Milton.
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   4. To destroy; to ruin; to waste. [Obs.]
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            One man's lust these many lives confounds. --Shak.
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            How couldst thou in a mile confound an hour? --Shak.

   Syn: To abash; confuse; baffle; dismay; astonish; defeat;
        terrify; mix; blend; intermingle. See Abash.
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The Collaborative International Dictionary of English v.0.48:

Confounded \Con*found"ed\, a.
   1. Confused; perplexed; unclear in mind or intent;
      bewildered.

   Syn: at sea, befuddled, bemused, bewildered, confused, mazed,
        mixed-up.
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              A cloudy and confounded philosopher. --Cudworth.
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   2. Excessive; extreme; abominable. [Colloq.]
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            He was a most confounded tory.        --Swift.
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            The tongue of that confounded woman.  --Sir. W.
                                                  Scott.
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WordNet (r) 3.0 (2006):

confounded
    adj 1: perplexed by many conflicting situations or statements;
           filled with bewilderment; "obviously bemused by his
           questions"; "bewildered and confused"; "a cloudy and
           confounded philosopher"; "just a mixed-up kid"; "she felt
           lost on the first day of school" [syn: baffled,
           befuddled, bemused, bewildered, confounded,
           confused, lost, mazed, mixed-up, at sea]