In the old days it was not uncommon for the admissions officer to pose some esoteric—make that wacko—question.
Dig deeper into exotic and esoteric areas of interest for direction in creative pursuits, especially.
This spirit of professionalism, however, risks alienating newcomers who may have unique or esoteric knowledge to contribute.
1650s, from Greek esoterikos "belonging to an inner circle," from esotero "more within," comparative adverb of eso "within," related to eis "into," en "in" (see en- (2)).
In English, originally of Pythagorean doctrines. According to Lucian, the division of teachings into exoteric and esoteric originated with Aristotle.