adjective
(of areas of discussion or research) Difficult, obscure.
(somewhat archaic) Hidden or removed from view.
noun
(rare) A recondite (hidden or obscure) person or thing.
(rare) A scholar or other person who is recondite, that is, who has mastery over his or her field, including its esoteric minutiae.
verb
(transitive, obsolete, rare) To conceal, cover up, hide.