hermetic Synonyms

closed impenetrable esoteric hermetically sealed airtight gas-tight leakproof impermeable watertight occult arcane air-tight shut sealed secretive bulletproof lightproof self-contained theosophical shellproof windtight weatherproof snug tight waterproof burglarproof sealed-tight sealed off zip-locked secluse unpiercable pressure-tight damp-proof vacuum-packed unpierceable rustproof rainproof dripless airproof air-proof water-repellent water-resistant hermetic-seeming seclusive secluded hermetical gastight firm exclusive enigmatic