Source : Webster's Revised Unabridged Dictionary (1913)

Trouble \Trou"ble\, v. t. [imp. & p. p. {Troubled}; p. pr. & vb.
   n. {Troubling}.] [F. troubler, OF. trobler, trubler,
   tourbler,fr. (assumed) LL. turbulare, L. turbare to
   disorderly group, a little crowd; both from turba a disorder,
   tumult, crowd; akin to Gr. ?, and perhaps to E. thorp; cf.
   Skr. tvar, tur,o hasten. Cf. {Turbid}.]
   1. To put into confused motion; to disturb; to agitate.

            An angel went down at a certain season into the
            pool, and troubled the water.         --John v. 4.

            God looking forth will trouble all his host.
                                                  --Milton.

   2. To disturb; to perplex; to afflict; to distress; to
      grieve; to fret; to annoy; to vex.

            Now is my soul troubled.              --John xii.
                                                  27.

            Take the boy to you; he so troubles me 'T is past
            enduring.                             --Shak.

            Never trouble yourself about those faults which age
            will cure.                            --Locke.

   3. To give occasion for labor to; -- used in polite
      phraseology; as, I will not trouble you to deliver the
      letter.

   Syn: To disturb; perplex; afflict; distress; grieve; harass;
        annoy; tease; vex; molest.

Source : WordNet®

troubled
     adj 1: characterized by or indicative of distress or affliction or
            danger or need; "troubled areas"; "fell into a
            troubled sleep"; "a troubled expression"; "troubled
            teenagers" [ant: {untroubled}]
     2: characterized by unrest or disorder or insubordination;
        "effects of the struggle will be violent and disruptive";
        "riotous times"; "these troubled areas"; "the tumultuous
        years of his administration"; "a turbulent and unruly
        childhood" [syn: {disruptive}, {riotous}, {tumultuous}, {turbulent}]