erase

(verb) remove from memory or existence. Synonyms: wipe out. Example: "The turks erased the armenians in 1915."

(verb) remove by or as if by rubbing or erasing. Synonyms: rub out, score out, efface, wipe off. Example: "Please erase the formula on the blackboard--it is wrong!."

(verb) wipe out digitally or magnetically recorded information. Synonyms: delete. Example: "Who erased the files form my hard disk?."