A more thorough explanation:

Definition: An excusator is a person who excuses or defends someone or something. In old German law, an excusator was a defendant who denied the plaintiff's claim.

• When the teacher asked why he was late, the student's friend acted as his excusator and said they got lost on the way to school.
• In court, the excusator argued that his client was not responsible for the damages because they had a valid reason for their actions.

These examples illustrate how an excusator can defend or excuse someone's actions or behavior. In the first example, the friend is trying to provide a reason for the student's lateness. In the second example, the excusator is trying to prove that his client is not at fault for the damages. Both examples show how an excusator can be used to defend or excuse someone or something.