]ə̇k(ə)lē, ]ēk-, -li adverb
1.
a. : in an airtight manner
hermetically sealed suit for use in high-altitude flying — H.G.Armstrong
b. : in a manner that prevents entry or change
doors hermetically sealed to less illustrious callers — Marguerite Steen
two gentlemen of decided and hermetically opposite views — Philip Hamburger
2. : in an obscure or mystical manner
hermetically painted in the Cubist discipline — Janet Flanner