hermetically

We have hermetically sealed our choices in a capsule under the supervision of someone whose relative works for Pricewaterhouse.
Style Conversational Week 1456: A matter of taste (even for the tasteless)|Pat Myers|September 30, 2021|Washington Post
The entire production process happens in a hermetically sealed system, with products from each stage transported to the next via a network of transparent plastic tubing.
Exclusive: Inside the Facilities Making the World's Most Prevalent COVID-19 Vaccine|Aryn Baker/Marburg, Germany|April 19, 2021|Time
For JPMorgan Chase, the Bernie Madoff stench can no longer be hermetically sealed.
JPMorgan and Madoff: Will the Scandal Sink Jamie Dimon?|Allan Dodds Frank|February 3, 2011|DAILY BEAST
Then quite suddenly, the hermetically sealed bubble around Castro was punctured.
The Day Castro Wept|A. L. Bardach|September 17, 2009|DAILY BEAST

The debates certainly would never have been this hermetically sealed and antiseptic.
McCain's Brilliant Campaign, Four Years Too Late|Caroline Marks|November 4, 2008|DAILY BEAST
These graves were once all hermetically sealed by slabs of marble, or tiles of terra cotta.
The Catacombs of Rome|William Henry Withrow
The curtains were hermetically closed, and for a moment the external world did not exist for us.
Camille (La Dame aux Camilias)|Alexandre Dumas, fils
The pictures thus hermetically sealed are indestructible so long as the glass is not fractured.
The Catacombs of Rome|William Henry Withrow
It was discovered by chance in 1858, having been until then hermetically sealed by a mass of limestone breccia.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3|Various
Th' shelf shud thin be nailed to th' wall iliven feet fr'm th' flure an' hermetically sealed.
Mr. Dooley Says|Finley Dunne