petrify
     v 1: cause to become stone-like or stiff or dazed and stunned;
          "The horror petrified his feelings"; "Fear petrified her
          thinking"
     2: change into stone; "the wood petrified with time" [syn: {lapidify}]
     3: make rigid and set into a conventional pattern; "rigidify
        the training schedule"; "ossified teaching methods";
        "slogans petrify our thinking" [syn: {rigidify}, {ossify}]
     [also: {petrified}]
Source: WordNet® 2.0