Hermetic
An English adjective meaning airtight or sealed, and also relating to esoteric or occult knowledge, both senses deriving from Hermes through different mythological traditions
The Meaning of Hermetic
The word "hermetic" has a dual derivation from Hermes. The sense meaning "airtight" or "completely sealed" comes from the alchemical tradition attributed to Hermes Trismegistus (Thrice-Greatest Hermes), a syncretic figure combining the Greek god Hermes with the Egyptian god Thoth. Alchemists attributed to Hermes Trismegistus the technique of sealing glass vessels by fusing the neck shut — a "hermetic seal" that prevented any substance from escaping or entering. This practical laboratory technique gave English the adjective meaning airtight or impervious. The broader philosophical sense — relating to esoteric, occult, or hidden knowledge — derives from the same syncretic figure. The Hermetic tradition, based on texts called the Hermetica supposedly authored by Hermes Trismegistus, encompassed alchemy, astrology, and theosophy, and profoundly influenced Renaissance thought. Both meanings connect to qualities of the original Greek Hermes: the god of boundaries, transitions, and secret knowledge, the only Olympian who moved freely between the realms of gods, mortals, and the dead.
Parents
None recorded
Symbols
Fun Fact
The hermetic seal used on modern food packaging traces its name through alchemy back to the Greek god Hermes and his Egyptian counterpart Thoth
Words We Inherited
English words and phrases that trace back to this myth. See our full guide to English words from Greek mythology.
Explore Further
Hermes Trismegistus
💭 conceptThe thrice-great, merging of Hermes and Thoth
A syncretic figure combining the Greek Hermes with the Egyptian Thoth, representing ultimate wisdom. The foundation of Hermeticism and alchemy.
Hermeticism
💭 conceptPhilosophy
A syncretic philosophical and spiritual tradition attributed to the legendary sage Hermes Trismegistus
Techne
💭 conceptThe knowledge of how to make and do things
The systematic art of making — the knowledge possessed by craftsmen, doctors, poets, and generals that transforms raw material into something purposeful.
Enthousiasmos
💭 conceptReligion and Inspiration
The state of being possessed by a god, the original meaning of divine inspiration in Greek religion.
Tantalum
💭 conceptChemistry and mythology
A chemical element named after King Tantalus of Greek mythology because of the element's tantalising inability to absorb acids, just as Tantalus could never reach the water and fruit surrounding him
Palladium
💭 conceptChemistry and mythology
A chemical element named after both the asteroid Pallas and the Palladium, the sacred wooden image of Pallas Athena that protected the city of Troy
Aletheia
💭 conceptTruth as unconcealment
The Greek concept of truth, meaning literally unconcealment — truth is what is revealed when hiding and forgetting are stripped away.
Orgia
💭 conceptreligion, mystery cults
Secret rites or sacred acts — the hidden ritual performances of mystery cults, particularly Dionysian worship, not originally referring to sexual excess.
Titanium
💭 conceptChemistry and mythology
A chemical element named after the Titans of Greek mythology to reflect its exceptional strength, discovered in 1791 and now essential to aerospace and medical engineering
Divination
💭 conceptReligion
The practice of seeking knowledge of the future or hidden things through divine communication
Episteme
💭 conceptknowledge, science
True knowledge based on demonstration and understanding of causes — as opposed to mere opinion.
Golden Bough
💭 conceptArtefact
A magical branch of gold that granted the living safe passage into and out of the underworld