irritate

v. t.

  1. To render null and void.
  2. To increase the action or violence of; to heighten excitement in; to intensify; to stimulate.
  3. To excite anger or displeasure in; to provoke; to tease; to exasperate; to annoy; to vex; as, the insolence of a tyrant irritates his subjects.
  4. To produce irritation in; to stimulate; to cause to contract. See Irritation, n., 2.

n.

  1. To make morbidly excitable, or oversensitive; to fret; as, the skin is irritated by friction; to irritate a wound by a coarse bandage.

a.

  1. Excited; heightened.