The term 'not intentional' can be described by three different crossword solutions: UNMEANT (7 letters), INADVERTENT (11 letters), and UNINTENTIONAL (13 letters). UNMEANT means not intended or not done on purpose, while INADVERTENT means happening without intention or thought. UNINTENTIONAL is similar to UNMEANT and INADVERTENT, but it implies that the action was not planned or desired. All three words describe an action that was not done with the intention of causing harm or a negative outcome.