save breath (adjective) futile: hopeless, pointless
Sinonime: abortive,
barren, bootless,
delusive,
empty,
exhausted,
forlorn,
fruitless,
hollow,
idle, impracticable,
impractical, in vain,
ineffective,
ineffectual,
insufficient, no dice,
nugatory, on a treadmill, otiose, out the window, profitless, resultless, save one's breath,
sterile, to no avail, to no effect, to no purpose,
trifling,
trivial, unavailing,
unimportant, unneeded, unproductive, unprofitable,
unreal,
unsatisfactory, unsubstantial,
unsuccessful,
useless,
vain, valueless,
worthlessAntonime: fruitful,
hopeful,
productive,
profitable