unsuccessfulOur attempts to change the law were unsuccessful.
failedThe company went bankrupt pouring money into yet another failed product.
badSales have been really bad this quarter.
fruitlessAll our pleas that she remain in university were fruitless - she left anyway.
unproductiveWe've had a terribly unproductive meeting.
ineffectiveThe trial shows that this drug is an ineffective treatment for cancer.
non-effectiveThis approach to increasing revenue was non-effective.
unviableThe party's plan to drastically cut taxes was economically unviable.
nonviableThe business was deemed commercially non-viable.
unavailingformalliteraryHis attentions to the heiress were courteous but unavailing.
vainHe campaigned night and day in a vain attempt to win the party nomination.
unpromisingMillions was spent on developing the treatment, but early tests show it is unpromising.
disastrousHe made a disastrous foray into politics.
patheticdisapprovingHis pathetic attempt at a joke failed spectacularly.
be dead in the waterThey pulled funding, so the project is dead in the water.
go adriftinformalAfter the kids left home, their marriage went adrift.