1. Remove by or as if by rubbing or erasing
   "Please efface the formula on the blackboard—it is wrong!";
   - erase, rub out, score out, wipe off
    
2. Remove completely from recognition or memory
   "efface the memory of the time in the camps";
   - obliterate
    
3. Make inconspicuous
   "efface oneself"

Derived forms: effaces, effacing, effaced

Type of: blur, cancel, delete, dim, humble, slur