気き密みつ

noun which may take the genitive case particle 'no', noun

airtight; hermetic

Describes a seal or enclosure that prevents air or gas from passing through. Commonly used in technical contexts such as containers, buildings, and packaging.

• この容よう器きは気き密みつ性せいが高たかいので、食しょく品ひんが長なが持もちします。

  This container is highly airtight, so food stays fresh longer.

• 気き密みつ構こう造ぞうの窓まどは断だん熱ねつ効こう果かも優すぐれている。

  Windows with an airtight structure also have excellent insulation.