Source : Webster's Revised Unabridged Dictionary (1913)

Anaesthetize \An*[ae]s"the*tize\, v. t. (Med.)
   To render insensible by an an[ae]sthetic. --Encyc. Brit.

Source : WordNet®

anaesthetize
     v : make unconscious by means of anesthetic drugs; "The patient
         must be anesthetized before the operation" [syn: {anesthetize},
          {anesthetise}, {anaesthetise}, {put to sleep}, {put
         under}, {put out}] [ant: {bring to}]