noun, noun or participle which takes 'suru', transitive verb
hermetic sealing; sealing tightly
Used for sealing containers, documents, or packages so that they are airtight or tamper-proof. Often appears in formal or technical contexts.
重要書類を厳封して送付した。
I sealed the important documents tightly and sent them.
この容器は厳封されて
This container is hermetically sealed, so care is needed when opening it.