invoke
     v 1: evoke or call forth, with or as if by magic; "raise the
          specter of unemployment"; "he conjured wild birds in the
          air"; "stir a disturbance"; "call down the spirits from
          the mountain" [syn: {raise}, {conjure}, {conjure up}, {evoke},
           {stir}, {call down}, {arouse}, {bring up}, {put forward},
           {call forth}]
     2: cite as an authority; resort to; "He invoked the law that
        would save him"; "I appealed to the law of 1900"; "She
        invoked an ancient law" [syn: {appeal}]
     3: request earnestly (something from somebody); ask for aid or
        protection; "appeal to somebody for help"; "Invoke God in
        times of trouble" [syn: {appeal}]
Source: WordNet® 2.0