rive
     v 1: tear or be torn violently; "The curtain ripped from top to
          bottom"; "pull the cooked chicken into strips" [syn: {rend},
           {rip}, {pull}]
     2: separate or cut with a tool, such as a sharp instrument;
        "cleave the bone" [syn: {cleave}, {split}]
     [also: {riven}]
Source: WordNet® 2.0