Source : WordNet®

gnawn
     See {gnaw}

gnaw
     v 1: bite or chew on with the teeth; "gnaw an old cracker";
          "chewed on a cookie"
     2: become ground down or deteriorate; "Her confidence eroded"
        [syn: {erode}, {gnaw at}, {eat at}, {wear away}]
     [also: {gnawn}]