Archive · Esoteric
stretchEsoteric
/ˌɛs.əʊˈtɛɹ.ɪk/·adjective
Intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle.
“The writing in this manual is very esoteric; I’d need a degree in engineering just to understand it!”
Synonymssecretive·cerebral·arcane·recondite