efface

(verb) remove completely from recognition or memory. Synonyms: obliterate. Example: "Efface the memory of the time in the camps."

(verb) make inconspicuous. Example: "Efface oneself."

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