hermetic

/hɜːˈmetɪk/ (bre, ipa) · /hɜːrˈmetɪk/ (ame, ipa) · /(ˌ)hər-ˈme-tik/ (ame, mw)

hermetic — adjective

  • hermeticpositive
  • more hermeticcomparative
  • most hermeticsuperlative

1. sealed in a way that stops air from getting in or out

1.形容詞C2
釋義

sealed in a way that stops air from getting in or out

例句

The lab stores the powder in a hermetic glass jar with a rubber ring.

hermetic + container noun

Before shipping the coffee beans, Linh checked that each bag was hermetic.

predicative use: a bag was hermetic

同義詞
  • airtight

    closest everyday synonym; strongly emphasizes that air cannot pass

  • sealed

    broader term that can describe something simply being closed, not necessarily perfectly airtight

反義詞
  • leaky

    allows air or other matter to pass through

  • unsealed

    not closed securely

文法句型

hermetic container

be hermetic

用法筆記

Usually used for containers, chambers, packages, or seals where blocking air matters. It is more exact than sealed, because it stresses that air cannot pass through the closure.

常見錯誤

❌This winter coat is hermetic enough for strong wind.
✅This container is hermetic, so no air gets in.
💡Hermetic is mainly used for sealed containers or spaces, not for ordinary clothing.

2. kept apart from outsiders and having very little contact or exchange with them

2.形容詞C2
釋義

kept apart from outsiders and having very little contact or exchange with them

例句

The boarding school remained hermetic, with students rarely meeting local families.

hermetic about a group closed to outsiders

For years, the sect lived in a hermetic community high in the mountains.

同義詞
  • insular

    emphasizes lack of interest in outside people or ideas

  • closed-off

    less formal and can apply to people as well as groups

  • isolated

    broader term that can describe physical or social separation

反義詞
  • open

    willing to deal with or accept people and ideas from outside

  • outward-looking

    actively interested in the wider world

文法句型

hermetic community

be hermetic

用法筆記

Often used for communities, institutions, or social circles. It emphasizes separation from outsiders and outside influence, not literal lack of air or a locked physical space.

常見錯誤

❌Our office is hermetic because the windows do not open.
✅Our office feels hermetic because nobody shares ideas with other teams.
💡This sense is about isolation from outsiders, not air flow.