hermetically

[ hur-met-ik-lee ]
/ hɜrˈmɛt ɪk li /
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adverb

so as to be airtight: hermetically sealed.

Origin of hermetically

First recorded in 1595–1605; hermetic + -ally
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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