ineffectual
crush
break down
ineffectively
inefficaciously
no good
inutilitarian
nutil
frustraneous
inefficacious
nonfailure
noneffective
ineffectiveness
inefficacy
inutility
duff
nugatory
imperviable
ineffectualness
ineffectivity
uneffective
disallowed
garbageness
come to nothing
blown
not worth a cress
drossy
unreliably
not worth a curse
not worth salt
shand
successlessly
goodless
dys-
fruitless
uncompatible
go to shit
bomb
nonfulfilment
as much use as a chocolate fireguard
turkey
waste of energy
vitiate
waste of effort
uselessly
virtueless
scabbed
invalidated
halt
attempted