hermetically

hermetic +‎ -ally

hermetically (comparative more hermetically, superlative most hermetically)

1. With a hermetic seal; so as to be airtight.
2. In a hermetic manner; isolatedly.
   • 2001, Timothy J. Lenz, James K. McDowell, “Knowledge management for the strategic design and manufacture of polymer composite products”, in Rajkumar Roy, editor, Industrial Knowledge Management: A Micro-Level Approach, →ISBN, page 379:

     Too often, this interchange of knowledge is thwarted, one way or another: the entropic leanings of the workplace foster hermetically isolated patterns of behavior.

• hermetically seal
• hermetically sealed