Source : Webster's Revised Unabridged Dictionary (1913)

Unquiet \Un*qui"et\, v. t. [1st pref. un- + quiet.]
   To disquiet. [Obs.] --Ld. Herbert.

Unquiet \Un*qui"et\, a. [Pref. un- + quiet.]
   Not quiet; restless; uneasy; agitated; disturbed. --
   {Un*qui"et*ly}, adv. -- {Un*qui"et*ness}, n.

Source : WordNet®

unquiet
     adj 1: characterized by unrest or disorder; "unquiet days of
            riots"; "following the assassination of Martin Luter
            King ours was an unquiet nation"; "spent an unquiet
            night tossing and turning" [ant: {quiet}]
     2: causing or fraught with or showing anxiety; "spent an
        anxious night waiting for the test results"; "cast anxious
        glances behind her"; "those nervous moments before
        takeoff"; "an unquiet mind" [syn: {anxious}, {nervous}, {uneasy}]