Source : Webster's Revised Unabridged Dictionary (1913)

Mistrust \Mis*trust"\, n.
   Want of confidence or trust; suspicion; distrust. --Milton.

Mistrust \Mis*trust"\, v. t.
   1. To regard with jealousy or suspicion; to suspect; to doubt
      the integrity of; to distrust.

            I will never mistrust my wife again.  --Shak.

   2. To forebode as near, or likely to occur; to surmise.

            By a divine instinct, men's minds mistrust Ensuing
            dangers.                              --Shak.

Source : WordNet®

mistrust
     n 1: doubt about someone's honesty [syn: {misgiving}, {distrust},
           {suspicion}]
     2: the trait of not trusting others [syn: {distrust}, {distrustfulness}]
        [ant: {trust}]
     v : regard as untrustworthy; regard with suspicion; have no
         faith or confidence in [syn: {distrust}, {suspect}] [ant:
          {trust}, {trust}]