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unseal

verb

  1. to remove a seal
L333410 on Wikidata ↗

Wiktionary

Pronunciation: /ʌnˈsiːl/

verb

Etymology: Etymology tree English un- Proto-Indo-European *sek- Proto-Indo-European *-nóm Proto-Italic *seknom Latin signum Proto-Indo-European *-lós Proto-Indo-European *-elós Proto-Italic *-elos Latin -lum Latin sigillum Anglo-Norman seelbor. Middle English sel English seal English unseal From un- + seal.

  1. To break the seal of (something) in order to open it.
  2. To open by having a seal broken.

    But it's just the equalising of pressure as the vault door unseals.