unscramble
     v 1: make intelligible; "Can you unscramble the message?" [ant: {scramble}]
     2: become or cause to become undone by separating the fibers or
        threads of; "the sweater unravelled" [syn: {unravel}, {unknot},
         {untangle}, {unpick}] [ant: {ravel}, {ravel}]
Source: WordNet® 2.0