The word that describes what you might be asking would be:
the intrinsic nature or indispensable quality of something, especially something abstract, which determines its character.
"conflict is the essence of drama"
synonyms: quintessence, soul, spirit, ethos, nature, life, lifeblood, core, heart, centre, crux, nub, nucleus, kernel, marrow, meat, pith, gist, substance, principle, central part, fundamental quality, basic quality, essential part, intrinsic nature, sum and substance, reality, actuality; quiddity, esse; informalnitty-gritty
"uncertainty is part of the very essence of economic activity"
an essential or characteristic part of something abstract.
"the death had all the elements of a great tabloid story"
synonyms: component, constituent, part, section, portion, piece, segment, bit; factor, feature, facet, ingredient, strand, detail, point; member, unit, module, item; essential
"Village shops are an essential element of the local community"
"Each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents(another word) of matter. Each element is distinguished by its atomic number, i.e. the number of protons in the nuclei of its atoms"
Another word might be :
noun: kind; plural noun: kinds
character or nature.
"the trials were different in kind from any that preceded them"
synonyms: character, nature, essence, quality, disposition, make-up, calibre; type, style, stamp, manner, description, mould, cast, temperament, ilk, kidney, persuasion; stripe