The term 'not accept' can be broken down into five crossword solutions: DISBELIEVE (10 letters), DENY (4 letters), WAIVER (6 letters), COUNTER (7 letters), and BLACKLIST (9 letters). DISBELIEVE means to not accept something as true, DENY means to refuse to accept or grant something, WAIVER means to not accept a right or claim, COUNTER means to oppose or reject something, and BLACKLIST means to not accept someone or something. All of these terms refer to the idea of not accepting something.