useless (of no use, not functional or practical): The information was entirely useless to us. Without electricity, computers are useless.
futile (having no effect or result; unsuccessful): The government made futile attempts to combat corruption.
to no avail (without result or success; for nothing): I searched everywhere to no avail.
pointless (having no sense, purpose, or use): She is not coming. It’s pointless to wait here.
fruitless (producing nothing of value; unsuccessful): The investigation has proven fruitless so far.
unavailing formal (not successful or useful): My efforts to locate him were unavailing.
in vain (without success or any useful result): All our hard work was ultimately in vain.
unusable (not usable, not good enough to use): The kitchen was unusable before the repairs.
At last I found a site that has everything I need.
Thank you so much.