intransitive verb
Definition: To protect or keep watch over something or someone.
Example: The soldiers guard the entrance to the base.
noun
Definition: A protective device or covering that helps to prevent injury or damage to a person or object.
Example: He wore a shin guard while playing soccer to protect his legs.
transitive verb
Definition: To protect someone or something from harm by watching over them or keeping them safe.
Example: The security team will guard the entrance to the building.