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。