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hermetically

UK:^*^*UK and possibly other pronunciationsUK and possibly other pronunciations/hɜː^rˈmɛtɪkəli/US:USA pronunciation: respellingUSA pronunciation: respelling(hûr met′ik lē)

her•met•i•cal•ly (hûr met′ik lē),USA pronunciation adv.

so as to be airtight:hermetically sealed.

hermetic + -ally 1595–1605

her•met•ic /hɜrˈmɛtɪk/USA pronunciation also herˈmet•i•cal, adj.

made, sealed, or closed so tightly that no air can escape.

her•met•i•cal•ly, adv.

her•met•ic (hûr met′ik),USA pronunciation adj.

made airtight by fusion or sealing.
not affected by outward influence or power;
isolated.
Mythology(sometimes cap.) of, pertaining to, or characteristic of occult science, esp. alchemy.
(cap.) of or pertaining to Hermes Trismegistus or the writings ascribed to him.

Also, her•met′i•cal.

Medieval Latin hermēticus of, pertaining to Hermes Trismegistus, equivalent. to Latin Hermē(s) Hermes + -ticus -tic
1630–40

'hermetically' also found in these entries (note: many are not synonyms or translations):

ampoule - pressure cooker - diving suit - Thermopane - tin - seal - sealed-beam headlight

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⇱ hermetically - WordReference.com Dictionary of English

hermetically