ADJ-GRADED 深奥的;难懂的;常人难以理解的 If you describe something as esoteric, you mean it is known, understood, or appreciated by only a small number of people. 深奥的;难懂的;常人难以理解的 [formal]
...esoteric knowledge.
深奥的知识
...a spoiled aristocrat with pretentious airs and esoteric tastes.