essential, necessary, necessity, requirement, requisite

unessential, furloughed, hiring freeze, noncritical, discretionary, unneeded, essential, inessential, precautionary, nonbusiness, nonmilitary, superfluous, nonsensitive, nonproductive, hazardous, nonproduction, trash pickup, nontherapeutic, behavior modification, wasteful, nonacademic, dispensable, hunker down, frugal, bottled water, nonworking, nonfood, unhealthful, unnecessary, discretional, unobligated, normal, nonmanufacturing, unprofitable, excessing, garbage pickup, sacrosanct, unallowable, sinful, prudent, consular, nonmandatory, drastic, neediest, unapproved, unappropriated, nonfinancial, salaried, riskier, risker, nonexempt, hatteras island, necessary, unplanned, impractical, custodial, extracurricular, wisest, unsafe, temporary, unproductive, unsalable, unplugged, noncomplying, thrifty, noncombat, nonstarter, preventive, disallowable, frivolous, conspicuous consumption, restoral, nonmedical, unrequested, quarantine, overpack, photic, harmful, supererogatory, layaway, unexcused, chopping block, janitorial, batten down, duplicative, nonelectric, reinspect, safe, wage freeze, distractive, undesirable, impassible, secularized, extravagant, extraneous, nonprescription, early retirement, civilian, sumptuary, inappropriate, disinfecting, nonoperational, ancillary, related, nonstructural, unimportant, nondefense, important, lmportant, other, laborintensive, miscellaneous, nonroutine, optional, redundant

adjunct

accessorial

breathe, entity, respire, something, take a breath

incidental