imperspicuity†; inconceivableness, vagueness &c adj.; obscurity;
ambiguity &c 520; doubtful meaning; uncertainty &c 475; perplexity &c
(confusion) 59; spinosity†; obscurum per obscurius [Lat.]; mystification
&c (concealment) 528; latency &c 526; transcendentalism.
paradox, oxymoron; riddle, enigma, puzzle &c (secret) 533; diagnus
vindice nodus [Lat.]; sealed book; steganography†, freemasonry.
pons asinorum [Lat.], asses' bridge; high Dutch, Greek, Hebrew;
jargon &c (unmeaning) 517.
V. be unintelligible &c adj.; require explanation &c 522; have a
doubtful meaning, pass comprehension.
render unintelligible &c adj.; conceal &c 528; darken &c 421;
confuse &c (derange) 61; perplex &c (bewilder) 475.
not understand &c 518; lose, lose the clue; miss; not know what to
make of, be able to make nothing of, give it up; not be able to account
for, not be able to make either head or tail of; be at sea &c
(uncertain) 475; wonder &c 870; see through a glass darkly &c
(ignorance) 491.
not understand one another; play at cross purposes &c
(misinterpret) 523.
Adj. 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) 533; indecipherable.
obscure, dark, muddy, clear as mud, seen through a mist, dim,
nebulous, shrouded in mystery; opaque, dense; undiscernible &c
(invisible) 447 [Obs.]; misty &c (opaque) 426; hidden &c 528; latent &c
526.
indefinite, garbled &c (indistinct) 447; perplexed &c (confused)
59; 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.
Phr. it's Greek to me.