enigmatic
I
adjective
ambiguous, baffling, bewildering, bothering, confounding, confusing, conjectural, cryptic, disconcerting, esoteric, hard to understand, hidden, inexplicable, mysterious, mystifying, nebulous, obscure, of hidden meaning, perplexing, perturbing, puzzling, secret, veiled
II
index
complex, debatable, difficult, disputable, elusive, equivocal, esoteric, inapprehensible, incomprehensible, indefinable, indefinite, indistinct, inexplicable, inexpressive, inscrutable, mysterious, obscure (abstruse), opaque, oracular, problematic, recondite, suspicious (questionable), vague
Burton's Legal Thesaurus.
William C. Burton.
2006