otiose

otiose adjective abortive, apathetic, arid, barren, bootless, dilatory, disengaged, dispensable, dormant, dried up, effete, exhausted, expendable, faineant, fallow, feckless, fruitless, futile, idle, impotent, impractical, inactive, indolent, ineffective, ineffectual, inefficacious, inefficient, inert, infertile, inoperative, invalid, issueless, jejune, jobless, lackadaisical, laggard, lagging, lame, languorous, lazy, leaden, lethargic, lethargical, lifeless, listless, lymphatic, motionless, neglectful, nonfunctioning, nonparticipating, nugatory, null and void, oscitant, passive, phlegmatic, powerless, resultless, slack, slothful, slow, sluggish, spiritless, stagnating, sterile, supine, torpescent, torpid, unable, unadaptable, unavailing, uncalled-for, unemployed, unfertile, unfruitful, unnecessary, unneeded, unoccupied, unproductive, unprofitable, unprolific, unserviceable, unsubstantial, unusable, unwanted, unworkable, useless, vain, valueless, wasted, weary, worthless

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See also: futile, inactive, indolent, nugatory, passive, redundant, stagnant, torpid, unproductive