Answer:
•being a substance that is not synthesized by the body in a quantity sufficient for normal health and growth and that must be obtained from the diet
•impossible to do without
•Adjective. essential, fundamental, vital, cardinal mean so important as to be indispensable. essential implies belonging to the very nature of a thing and therefore being incapable of removal without destroying the thing itself or its character
Synonyms & Antonyms
Synonyms: Adjective
built-in, constitutional, constitutive, hardwired, immanent, inborn, inbred, indigenous, ingrain, ingrained (also engrained), inherent, innate, integral, intrinsic, native, natural
Synonyms: Noun
condition, demand, must, must-have, necessary, necessity, need, needful, requirement, requisite, sine qua non
Antonyms: Adjective
dispensable, inessential, needless, nonessential, unessential, unnecessary, unneeded
Antonyms: Noun
nonessential, nonnecessity
