The Collaborative International Dictionary of English v.0.48:

Disquiet \Dis*qui"et\, a.
   Deprived of quiet; impatient; restless; uneasy. [R.] --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Disquiet \Dis*qui"et\, n.
   Want of quiet; want of tranquility in body or mind;
   uneasiness; restlessness; disturbance; anxiety. --Swift.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

         Why art thou cast down, O my soul, and why art thou
         disquieted within me?                    --Ps. xlii.
                                                  11.
   [1913 Webster]

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

   Syn: To harass; disturb; vex; fret; excite; agitate.
        [1913 Webster]

WordNet (r) 3.0 (2006):

disquiet
    n 1: a feeling of mild anxiety about possible developments [syn:
         anxiousness, disquiet]
    2: the trait of seeming ill at ease [syn: disquiet, unease,
       uneasiness]
    v 1: 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,
         disquiet, trouble, cark, distract, disorder]