abstruse Synonyms

deep recondite metempirical perplexing professorial profound puzzling rarefied recherche secret subtle pedantical orphic oracular methodological mysterious mystic mystical mystifying obfuscated obscure occult ontological opaque supermundane technical kabbalistic under-the-table well-educated little-known low profile nonmaterial unclear over one's head pansophic under wraps high tech te technological transcendental vague vapory veiled wildering yin unintelligible nonfigurative unfathomable vocational abstract