useless

adjectives

having no beneficial use or incapable of functioning usefully
"a kitchen full of useless gadgets"; "she is useless in an emergency"
useless
is derived from
uselessness
antonym
useful
is similar to
producing no result or effect
"a futile effort"; "the therapy was ineffectual"; "an otiose undertaking"; "an unavailing attempt"
futile, ineffectual, otiose, unavailing
is similar to
not worth using
inutile
is similar to
not capable of being used
unserviceable, unusable, unuseable
see also
not producing an intended effect
"an ineffective teacher"; "ineffective legislation"
ineffective, ineffectual, uneffective
see also
producing little or no profit or gain
"deposits abandoned by mining companies as unprofitable"
unprofitable
see also
not ready for service
"unserviceable equipment may be replaced"
unserviceable
is an attribute of
the quality of being of practical use
usefulness, utility