THESAURUS
inexplicable
aimless, baffling, bewildering, casual, causeless, confounding, designless, driftless, dysteleological, enigmatic, enwrapped in mystery, haphazard, incomprehensible, indecipherable, indefinable, indescribable, indiscriminate, inextricable, inscrutable, insoluble, insolvable, mindless, mysterious, mystic, mystifying, odd, peculiar, perplexing, promiscuous, purposeless, puzzling, random, stochastic, strange, stray, unaccountable, undefinable, undirected, unexplainable, unfathomable, unintelligible, uninterpretable, unmotivated, unsolvable
ROGET THESAURUS
inexplicable
Unintelligibility
N
unintelligibility, incomprehensibility, imperspicuity, inconceivableness, vagueness, obscurity, ambiguity, doubtful meaning, uncertainty, perplexity, spinosity, obscurum per obscurius, mystification, latency, transcendentalism, paradox, oxymoron, riddle, enigma, puzzle, diagnus vindice nodus, sealed book, steganography, freemasonry, pons asinorum, asses' bridge, high Dutch, Greek, Hebrew, jargon, unintelligible, unaccountable, undecipherable, undiscoverable, unknowable, unfathomable, incognizable,
inexplicable, inscrutable, inapprehensible, incomprehensible, insolvable, insoluble, impenetrable, illegible, as Greek to one, unexplained, paradoxical, enigmatic, enigmatical, puzzling (secret), indecipherable, obscure, dark, muddy, clear as mud, seen through a mist, dim, nebulous, shrouded in mystery, opaque, dense, undiscernible, misty, hidden, latent, indefinite, garbled, perplexed, undetermined, vague, loose, ambiguous, mysterious, mystic, mystical, acroamatic, acroamatical, metempirical, transcendental, occult, recondite, abstruse, crabbed, inconceivable, inconceptible, searchless, above comprehension, beyond comprehension, past comprehension, beyond one's depth, unconceived, inexpressible, undefinable, incommunicable, unpredictable, unforeseeable, it's Greek to me.