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hermetic

1 ENTRIES FOUND:
hermetic /hɚˈmɛtɪk/ adjective
hermetic
/hɚˈmɛtɪk/
adjective
Britannica Dictionary definition of HERMETIC
formal
: closed tightly so that no air can go in or out

— hermetically

/hɚˈmɛtɪkli/ adverb