1 : requiring secret or mysterious knowledge; "the arcane science of dowsing"
2 : marked by difficulty of style or expression; "much that was dark is now quite clear to me"; "those who do not appreciate Kafka's work say his style is obscure"
3 : stemming from evil characteristics or forces; wicked or dishonorable; "black deeds"; "a black lie"; "his black heart has concocted yet another black deed"; "Darth Vader of the dark side"; "a dark purpose"; "dark undercurrents of ethnic hostility"; "the scheme of some sinister intelligence bent on punishing him"-Thomas Hardy
adjectif
1 : confined to and understandable by only an enlightened inner circle
