The term 'not reliable' can be described by a variety of words, such as 'UNSAFE' (6 letters), 'IFFY' (4 letters), 'UNTRIED' (7 letters), 'DERELICT' (8 letters), 'FALLIBLE' (8 letters), 'hitormiss' (9 letters), 'hitandmiss' (10 letters), and 'UNPREDICTABLE' (13 letters). These words all describe something that is not dependable or trustworthy, and may have an uncertain outcome. For example, something that is 'UNSAFE' is not secure and could be dangerous, while something that is 'IFFY' is uncertain and could go either way. Similarly, something that is 'UNTRIED' has not been tested or proven, and something that is 'DERELICT' is neglected and abandoned. Additionally, something that is 'FALLIBLE' is capable of making mistakes, and something that is 'hitormiss' or 'hitandmiss' is UNPREDICTABLE and inconsistent. Finally, something that is 'UNPREDICTABLE' is impossible to anticipate.