esoteric

Esoteric refers to knowledge or information that is understood by a select group of people and is not widely known or accessible to the general public. This can involve specialized topics, complex theories, or niche interests that require specific expertise or experience to fully grasp. In contrast to mainstream knowledge, esoteric subjects may be found in areas such as philosophy, spirituality, or certain scientific fields. The term often implies that the information is intentionally kept within a certain community, making it less familiar or comprehensible to those outside that group.