Synonyms and related words :
coherent, cohesive, enwrapped in mystery, impartible, indefinable, indiscerptible, indissoluble, indissolvable, indivisible, inexplicable, inextricable, infrangible, infusible, inseparable, insolvable, mysterious, mystic, unaccountable, undefinable, undividable, unexplainable, unified, uninterpretable, unsolvable