esoteric

/ˌɛsəˈtɛrɪk/
adjective
  1. Intended for or understood by only a small number of people with special knowledge or interest.
    • She enjoys reading esoteric philosophy books that few people have heard of.
    • The professor's lecture on medieval poetry was so esoteric that most students felt lost.
    • The club's rules were esoteric, known only to long-time members.
What does "esoteric" mean? | whatsthatwordmean | whatsthatwordmean