The term 'close hermetically' can be summarized as sealing something completely and airtight. The word 'SEAL' is a four-letter word that is often used to describe the action of closing hermetically. This term is often used when referring to the process of sealing a container or other object in order to keep out air, moisture, or other contaminants. It is also used to refer to the process of sealing a document or other item in order to protect its contents from being accessed or altered.