unfeasible, uneconomical, expensive, costly, feasible, unaffordable, impractical, onerous, exorbitant, burdensome, uneconomic, unviable, problematic, infeasible, daunting, cumbersome, inviable, cheaper, labor intensive, pricey, unpractical, difficult, uncompetitive, viable, inconvenient, impossible, unworkable, insurmountable, inhibitive, problematical, unmanageable, doable, preferable, inexpensive, inefficient, untenable, unattractive, advantageous, obsolete, unappealing, surmountable, undoable, inadequate, unobtainable, manageable, restrictive, affordable, economical, inflexible, inaccessible, unreliable, unsuitable, astronomical, worthwhile, unattainable, unusable, arduous, unreasonable, ineffective, unwise, consuming, unrealistic, counterproductive, unwieldy, desirable, attractive, complicated, unpopular, unnecessary, unpalatable, insignificant, risky, negligible, unavoidable, unadvisable, amenable, anathema, expendable, unsustainable, insufficient, leery, unachievable, stumbling block, suitable, necessary, intolerable, irrelevant, effective, undesirable, outdated, unscalable, costless, unsafe, troublesome, inconceivable, moot, beneficial, constrained, unremunerative, unacceptably, unsuited, unreachable, prohibitory, confiscatory, discriminatory, applicable, calculable, minimum, dumping, nondiscriminatory, extortionate, stringent, arbitrary, estimated, reduced, staggering, sumptuary

prohibitively

preventative, preventive