Source : Webster's Revised Unabridged Dictionary (1913)

Vex \Vex\, v. t. [imp. & p. p. {Vexed}; p. pr. & vb. n.
   {Vexing}.] [F. vexer, L. vexare, vexatum, to vex, originally,
   to shake, toss, in carrying, v. intens. fr. vehere, vectum,
   to carry. See {Vehicle}.]
   1. To to?s back and forth; to agitate; to disquiet.

            White curl the waves, and the vexed ocean roars.
                                                  --Pope.

   2. To make angry or annoyed by little provocations; to
      irritate; to plague; to torment; to harass; to afflict; to
      trouble; to tease. ``I will not vex your souls.'' --Shak.

            Then thousand torments vex my heart.  --Prior.

   3. To twist; to weave. [R.]

            Some English wool, vexed in a Belgian loom.
                                                  --Dryden.

   Syn: See {Tease}.

Source : WordNet®

vexing
     adj 1: extremely annoying or displeasing; "his cavelier curtness of
            manner was exasperating"; "I've had an exasperating
            day"; "her infuriating indifference"; "the ceaseless
            tumult of the jukebox was maddening" [syn: {exasperating},
             {infuriating}, {maddening}]
     2: causing irritation or annoyance; "tapping an annoying rhythm
        on his glass with his fork"; "aircraft noise is
        particularly bothersome near the airport"; "found it
        galling to have to ask permission"; "an irritating delay";
        "nettlesome paperwork"; "a pesky mosquito"; "swarms of
        pestering gnats"; "a plaguey newfangled safety catch"; "a
        teasing and persistent thought annoyed him"; "a vexatious
        child"; "it is vexing to have to admit you are wrong"
        [syn: {annoying}, {bothersome}, {galling}, {irritating}, {nettlesome},
         {pesky}, {pestering}, {pestiferous}, {plaguy}, {plaguey},
         {teasing}, {vexatious}]