Definition of futile:
otiose, fruitful, exhausted, egotistic, faulty, unreal, yeasty, conceited, lazy, frothy, slothful, unimportant, bootless, light-minded, delusive, profitless, uneffective, inconstant, defective, vapid, nugatory, indolent, trivial, inefficacious, worthless, petty, impracticable, work-shy, ineffectual, unavailing, unsatisfactory, sleeveless, dizzy, pathetic, empty, valueless, swollen, birdbrained, thrive, swollen-headed, featherbrained, unsatisfying, superfluous, barren, vain, unneeded, scatterbrained, hopeless, goofy, egotistical, faineant, hollow, silly, harebrained, shadowy, visionary, trifling, inefficient, puerile, deceitful, idle, flighty, in vain, senseless, effective, self-conceited, used, light-headed, wasted, unable, null, frivolous, fruitless, small, purposeless, baseless, unproductive, unprofitable, ditzy, unsubstantial, useless.
- unsuccessful (part of speech: adjective)
- useless (part of speech: adjective)
- "The Air Trust", George Allan England.
- "The Portal of Dreams", Charles Neville Buck.
Only, somehow, after the large dreams and hopes of the early days, to come down to this perpetual campaign of petty law- breaking, and futile outrage, to these odious meetings and shrieking newspapers, was to be- well, discouraged!- "Delia Blanchflower", Mrs. Humphry Ward.