What does hermetical mean?
Hermetical is an uncommon formal adjective describing something airtight or so securely sealed that air, gases, or liquids cannot pass through it. Its clearest modern use is in technical and historical descriptions of vessels, enclosures, containers, and seals. The word appears especially often in the established phrase “hermetical seal,” although the shorter and more familiar adjective “hermetic” is now the usual choice in contemporary English. A second, chiefly historical sense connects the word with Hermes and the body of philosophical, religious, and alchemical writings traditionally attributed to Hermes Trismegistus. In this context, “Hermetic,” with a capital H, is generally used for the broader tradition. Hermetical is therefore valuable chiefly for formal writing, historical description, and specialist vocabulary, where its older appearance conveys precision and tradition. Although it can sound archaic, it remains readily understood and provides a direct way to describe a perfect or airtight seal.
adjectiveHermetical means airtight or sealed so as to prevent the passage of air, gases, or liquids. In historical contexts, it can also mean associated with Hermes or the Hermetic tradition.
- Airtight, sealed, or impervious to the passage of air, gases, or liquids.
- Relating to Hermes or to the historical Hermetic writings and tradition.
"The vial was closed with a hermetical seal that prevented any air from entering."
"The engineer tested the hermetical seal before placing the instrument in the chamber."
"Scholars classified the treatise as hermetical because it belonged to the corpus associated with the Hermetic tradition."
Hermetical preserves the name of Hermes, the Greek god whose legendary name was later attached to a vast body of mystical and alchemical writings.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of hermetical
English borrowed the word in the early 17th century from French hermétique, a form based on Latin Hermeticus. The Latin adjective came from Greek Hermētēs, meaning Hermes, the Greek god associated with boundaries, travelers, and transmission of hidden knowledge. Through later associations with the writings and alchemical traditions attributed to Hermes Trismegistus, the word acquired both its sealing sense and its historical connection with esoteric learning. English “hermetic” and “hermetist” are closely related forms, while “hermeneutic” belongs to the wider Greek family of words derived from the name Hermes.
Related word forms
How hermetical is actually used
The word is formal and somewhat archaic; modern technical writing usually prefers “hermetic,” as in “hermetic seal.” The historical sense relating to the broader mystical tradition is normally expressed as “Hermetic.”
Easily confused with hermetical
The words overlap in meaning, but “hermetic” is the usual modern adjective, while “hermetical” is a formal and comparatively uncommon variant.