IPA: /hɜːˈmɛtɪkli/
KK: /hɜrˈmɛtɪkli/
In a way that prevents air or other gases from entering or escaping; airtight.
The food was stored hermetically to keep it fresh for a long time.
Hermetically → It is formed from "Hermeticus" (meaning related to Hermes, the Greek god associated with alchemy and secrecy) and the suffix "-ally" (meaning in a manner). The word "hermetically" refers to something that is sealed in a way that prevents air or other substances from entering, often implying a sense of secrecy or protection.
Think of the connection to Hermes, the god of secrecy, to remember that "hermetically" means sealed in a way that keeps things completely enclosed.