Reseal (verb)

1. To seal something again, typically after it has been opened or used.
2. To make something airtight or waterproof again.

Origin:

From the prefix "re-" meaning "again" and "seal" meaning "to close or fasten something so that it cannot be opened or entered".

Examples:

1. After opening the jar, we resealed it to keep the contents fresh.
2. The windows were resealed to prevent drafts.
3. The water bottle was resealed after being refilled.
4. They resealed the envelope before sending it.
5. The boat's hull needed to be resealed to keep it from leaking.