think back Antonyms

disremember let slip from memory be unable to call to mind be unable to picture be unable to remember be unable to summon up be unaware clean forget discard from memory escape one's memory fail to bring to mind fail to recollect dismiss from mind consign to oblivion forget misrecollect unlearn lose track draw a blank forget about let slip fail to recall have a head like a sieve have a memory like a sieve have a mind like a sieve fail to think