ineffective

adj.

[1]	unproductive , uneffective , ineffectual , unfruitful , bootless , idle , vain , useless , ineffectual , inefficacious , inoperative , non-functioning , inadequate , insufficient , worthless
[2]	inefficient , ineffectual , unable , incompetent , incapable , unskilled , unskilful , inept , unfit , unproficient
[3]	inefficient