hermetically
Word family adverbhermeticallynounhermeticityhermeticsadjectivehermetic
her·met·ic·ally /həˈmetɪkli $ hər-/ adverbadv technical hermetically sealed technical very tightly closed so that air cannot get in or out 密封的 SYN airtight —hermetic adjectiveadj
Origin hermetically (1600-1700) Modern Latin hermeticus, from Hermes Trismegistus, a magician in ancient stories who invented a way of keeping air out of containers