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esoteric (EN)
adjective, noun

adjective “esoteric”

base form esoteric (more/most)
  1. meant to be understood by a select few who have special knowledge or interests
    The professor's lecture on quantum mechanics was filled with esoteric concepts that went over the heads of most students in the class.

noun “esoteric”

singular esoteric, plural esoterics or uncountable
  1. a complex written work or set of ideas that only a few with specialized knowledge can understand
    She spent years studying the esoterics of Kabbalah, fascinated by its ancient mystical insights.
  2. a person who understands or follows complex, specialized teachings and practices
    The esoterics gathered at the old library every full moon to discuss the hidden meanings behind alchemical texts.