not effective; not producing results; ineffectual

ineffective efforts; ineffective remedies.

inefficient or incompetent; incapable

an ineffective manager.

lacking in artistic effect, as a literary work, theatrical production, or painting.

adjective

effective

adjective

abortive , anticlimactic , barren , bootless , defeasible , emasculate , feckless , feeble , forceless , fruitless , futile , idle , impotent , inadequate , incompetent , indecisive , ineffectual , inefficacious , inefficient , inept , inferior , innocuous , inoperative , lame , limited , neutralized , no go , no way , not effective , nugatory , null , paltry , powerless , slack-spined , spineless , unable , unavailable , unavailing , unfruitful , unproductive , unprofitable , unsuccessful , vain , void , withered , worthlessnotes:ineffectual refers to a general or habitual lack of success in the carrying out of one\'s projects; ineffective refers to a specific or definite failure to perform a task or accomplish a purpose , useless , faineant , flaccid , incapable , otiose , pathetic , weak , worthless