recondite

/ˈre-kən-ˌdīt/

Latin reconditus, past participle of recondere to conceal, from re- + condere to store up, from com- + -dere to put

adjective

  1. difficult or impossible for one of ordinary understanding or knowledge to comprehend : deep

  2. of, relating to, or dealing with something little known or obscure

  3. hidden from sight : concealed

a recondite subject