To encapsulate something means to completely cover or surround it.
When something is encapsulated, it is like it is inside a little bubble or box.
Examples:
The medicine is encapsulated in a small pill.
The ship is encapsulated by the thick fog.
The treasure was encapsulated in a glass case.
She encapsulated her feelings in a song.
The superhero encapsulated the villain in a force field.
The magic spell encapsulated the castle in a protective shield.