Source : Webster's Revised Unabridged Dictionary (1913)

Disquiet \Dis*qui"et\, a.
   Deprived of quiet; impatient; restless; uneasy. [R.] --Shak.

Disquiet \Dis*qui"et\, n.
   Want of quiet; want of tranquility in body or mind;
   uneasiness; restlessness; disturbance; anxiety. --Swift.

Disquiet \Dis*qui"et\, v. t. [imp. & p. p. {Disquieted}; p. pr.
   & vb. n. {Disquieting}.]
   To render unquiet; to deprive of peace, rest, or tranquility;
   to make uneasy or restless; to disturb.

         Why art thou cast down, O my soul, and why art thou
         disquieted within me?                    --Ps. xlii.
                                                  11.

         As quiet as these disquieted times will permit. --Sir
                                                  W. Scott.

   Syn: To harass; disturb; vex; fret; excite; agitate.

Source : WordNet®

disquiet
     n 1: a feeling of mild anxiety about possible developments [syn:
          {anxiousness}]
     2: the trait of seeming ill at ease [syn: {unease}, {uneasiness}]

disquiet
     v : disturb in mind or make uneasy or cause to be worried or
         alarmed; "She was rather perturbed by the news that her
         father was seriously ill" [syn: {perturb}, {unhinge}, {trouble},
          {cark}, {distract}, {disorder}]