| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | airtight |
| Synonyms: | completely sealed, impervious, sealed, shut, tight, waterproof, watertight |
| Main Entry: | esoteric |
| Part of Speech: | adjective |
| Definition: | mysterious, obscure |
| Synonyms: | Delphic, Orphic, Sibylline, abstruse, acroamatic, arcane, cabalistic, cryptic, deep, heavy, hermetic, hidden, inner, inscrutable, mystic, mystical, occult, private, profound, recondite, secret |
| Notes: | eclectic means selecting what seems best of various styles, methods, or ideas while esoteric means intended for and understandable by only a small knowledgeable group |
| Antonyms: | common, familiar, known, obvious, public, unmysterious |
| Main Entry: | hidden |
| Part of Speech: | adjective |
| Definition: | unseen, secret |
| Synonyms: | QT, abstruse, buried, clandestine, cloaked, close, clouded, concealed, covered, covert, cryptic, dark, disguised, eclipsed, esoteric, hermetic, hermetical, imperceivable, in the dark, indiscernible, invisible, latent, masked, mysterious, mystic, mystical, obscure, occult, out of view, private, recondite, screened, secluded, sequestered, shadowy, shrouded, surreptitious, ulterior, undercover, underground, undetected, undisclosed, unexposed, unknown, unrevealed, veiled, withheld |
| Antonyms: | bare, exhibited, exposed, open, out, seen, showing, uncovered |
| Main Entry: | impenetrable |
| Part of Speech: | adjective |
| Definition: | dense |
| Synonyms: | bulletproof, close, compact, firm, hard, hermetic, impassable, impermeable, impervious, inviolable, solid, substantial, thick, unpiercable |
| Antonyms: | clear, penetrable, permeable, porous, soft, thin |
| Main Entry: | impermeable |
| Part of Speech: | adjective |
| Definition: | impenetrable |
| Synonyms: | airtight, dense, hermetic, impassable, impervious, leak-proof, nonporous, sealed, water-resistant, waterproof, watertight |
| Main Entry: | impervious |
| Part of Speech: | adjective |
| Definition: | unable to be penetrated |
| Synonyms: | closed to, hermetic, immune, impassable, impassive, impenetrable, impermeable, imperviable, inaccessible, invulnerable, resistant, sealed, tight, unaffected, unapproachable, unmoved, unpierceable, unreceptive, watertight |
| Antonyms: | exposed, open, penetrable, responsive, sensitive, vulnerable |
| Main Entry: | occult |
| Part of Speech: | adjective |
| Definition: | mysterious, secret; supernatural |
| Synonyms: | abstruse, acroamatic, arcane, cabalistic, concealed, deep, eerie, esoteric, hermetic, hidden, invisible, magic, magical, mystic, mystical, obscure, orphic, preternatural, profound, psychic, recondite, transmundane, unearthly, unknown, unrevealed, veiled, weird |
| Antonyms: | known, natural |
| Main Entry: | profound |
| Part of Speech: | adjective |
| Definition: | intellectual, thoughtful |
| Synonyms: | Orphic, abstruse, acroamatic, deep, difficult, discerning, enlightened, erudite, esoteric, heavy*, hermetic, informed, intellectual, intelligent, knowing, knowledgeable, learned, mysterious, occult, penetrating, philosophical, recondite, reflective, sagacious, sage, scholarly, secret, serious, shrewd, skilled, subtle, thorough, weighty, wise |
| Antonyms: | ignorant, stupid |
| Main Entry: | recluse/reclusive |
| Part of Speech: | adjective |
| Definition: | hermitlike, unsociable |
| Synonyms: | antisocial, ascetic, cloistered, eremetic, hermetic, isolated, misanthropic, monastic, reserved, retiring, secluded, secluse, seclusive, sequestered, solitary, standoffish, withdrawn |
| Antonyms: | extroverted, friendly, sociable |