adj. 25B6; adjective MYSTERIOUS, inscrutable, puzzling, mystifying, baffling, perplexing, impenetrable, unfathomable, sphinx-like, Delphic, oracular; cryptic, elliptical, ambiguous, equivocal, paradoxical, obscure, oblique, secret.
ENIGMATIC
Meaning of ENIGMATIC in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012