esoteric es-uh-TER-ik adjective WS #15

intended for or likely to be understood by only a small number of people with a specialized knowledge or interest; abstruse; mysterious or obscure

1. The esoteric symbols carved into the stone tablet puzzled archaeologists for decades.
2. The book contained esoteric references that only scholars of medieval literature would understand.
3. She had an esoteric interest in ancient Celtic mythology that few people shared.
4. His esoteric knowledge of rare butterflies made him the perfect curator for the exhibit.
5. The professor's esoteric lecture on quantum mechanics was difficult for most students to follow.