essential Definition

vital, indispensable, important, crucial, necessary, necessity, basic, requirement, must, staple, requisite, substantial, primary, constitutive, substantive, constituent, virtual, basal, biogenic, constitutional, organic, all-important, all important, in essence, life-sustaining, of import, of the essence, unexpendable, critical, integral, imperative, prerequisite, paramount, key, invaluable, valuable, fundamental, needed, foundational, required, precondition, irreplaceable, need, appropriate, intrinsic, unavoidable, pivotal, pertinent, urgent, essence, relevant, importance, inalienable, determinant, instrumental, inescapable, bedrock, meaningful, basics, core, overriding, inevitable, significant, salient, backbone, unnecessary, indispensability, overarching, compulsory, quintessential, absolutely, ultimate, mandatory, great, inherent, absolute, mainstay, main, compelling, major, seminal, central, utmost, genuine, basically, inexcusable, crux, decisive, primordial, underlying, momentous, focal, real, prominent, basis, leading, existential, thrust, gist, bulk,