unseal

verb2

1. •
   To break the seal of (something) in order to open it.

   • And a new time capsule was created by high schools students from the society’s internship program. They selected items to be unsealed in 2114, including tickets to a Lady Gaga concert. — 2014
2. •
   To open by having a seal broken.

   • But it's just the equalising of pressure as the vault door unseals. — 2017