Hermetically

The pressure cooker is a cooking utensil that closes hermetically.

“Vocabulary” and “grammar” are not hermetically sealed-off categories.

The door was hermetically sealed. No sound from outside reached my ears.

a hermetically sealed jar

they hermetically seal the jars

living hermetically

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

This was partly because of the fact that race issues were so contentious in the late 2010s, but anyone who thinks race wasn’t being discussed hotly in the late 1980s either wasn’t there or was living quite hermetically. The more important difference was social media, which propagates and even transforms terms more rapidly than broadcasting and print.