Source : Webster's Revised Unabridged Dictionary (1913)

Agitate \Ag"i*tate\, v. t. [imp. & p. p. {Agitated}; p. pr. &
   vb. n. {Agitating}.] [L. agitatus, p. p. of agitare to put in
   motion, fr. agere to move: cf. F. agiter. See {Act},
   {Agent}.]
   1. To move with a violent, irregular action; as, the wind
      agitates the sea; to agitate water in a vessel. ``Winds .
      . . agitate the air.'' --Cowper.

   2. To move or actuate. [R.] --Thomson.

   3. To stir up; to disturb or excite; to perturb; as, he was
      greatly agitated.

            The mind of man is agitated by various passions.
                                                  --Johnson.

   4. To discuss with great earnestness; to debate; as, a
      controversy hotly agitated. --Boyle.

   5. To revolve in the mind, or view in all its aspects; to
      contrive busily; to devise; to plot; as, politicians
      agitate desperate designs.

   Syn: To move; shake; excite; rouse; disturb; distract;
        revolve; discuss; debate; canvass.

Source : WordNet®

agitating
     adj : causing or tending to cause anger or resentment; "a
           provoking delay at the airport" [syn: {agitative}, {provoking}]