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hermetic

adjective

/hərˈmɛtɪk/

Meaning

Completely sealed, especially so that no air can enter or escape.

The medicine was kept in a hermetic container.

airtight, sealed, closed, watertight, impenetrable

open, leaky, permeable

hermetic seal, hermetic container, hermetic closure

Effective for a specific purpose

in accordance with or following something, especially a law or rule

filled with shock or horror

relating to a close relationship that is not romantic or sexual

having a great deal of money; wealthy

Containing poison; capable of causing illness or death.