Nugatory

1. (a.) Of little importance; trifling; vain; futile; insignificant.

2. (a.) of no force; inoperative; ineffectual.

Thesaurus Entries

NG, airy, asinine, barren, bootless, catchpenny, cheap, counterproductive, effete, empty, etiolated, fatuitous, fatuous, feckless, flimsy, foolish, fribble, fribbling, frivolous, frothy, fruitless, futile, good-for-naught, good-for-nothing, hollow, idle, inadequate, inane, ineffective, ineffectual, inefficacious, inoperative, invalid, junk, junky, light, no-account, no-good, not worth having, not worth mentioning, not worthwhile, nugacious, of no force, otiose, shabby, shallow, shoddy, silly, slender, slight, sterile, superficial, trashy, trifling, trite, trivial, unavailing, useless, vacuous, vain, valueless, vapid, windy, worthless