hermetically

adverb3

1. •
   In a hermetic way.
2. •
   With a hermetic seal; so as to be airtight.

   • they hermetically seal the jars
3. •
   In an isolated manner.

   • Too often, this interchange of knowledge is thwarted, one way or another: the entropic leanings of the workplace foster hermetically isolated patterns of behavior. — 2001