Outside of the sealed capsule, other scientists are also monitoring and observing how a hermetic environment affects people's physiological changes, biological rhythms, sleep patterns and psychological health.
Both Gaston and his wife would have liked to incorporate him into the family life, but Aureliano was a hermetic man with a cloud of mystery that time was making denser.
They spent the greater part of the day closeted in the bedroom in hermetic conferences and at dusk they asked for an escort and some accordion players and took over Catarino's store.
Sophie's World A Novel About the History of Philosophy
It is more important that Hermes also gave his name to the word " hermetic, " which means hidden or inaccessible—not inappropriate for the way Hermes takes care to keep the two of us hidden from each other.