A person who practices, studies, or advocates esotericism; someone who believes in or uses secret or hidden knowledge.
From 'esoteric' + '-ist' (person who follows a practice). The '-ist' suffix creates agent nouns indicating someone devoted to a particular belief system or practice.
Medieval alchemists were esotericists in the truest sense—they believed they had uncovered cosmic secrets through years of experimentation and swore to pass them on only to worthy students, creating an underground chain of knowledge.
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