1. Be unable to remember
   "You are disremembering the name of your first wife!";
   - forget, block, blank out, draw a blank
    
2. Dismiss from the mind; stop remembering
   "I tried to disremember these unpleasant memories";
   - forget, bury

Derived forms: disremembered, disremembering, disremembers

Type of: cerebrate, cogitate, lose, think