A more thorough explanation:

A GRATIA

A gratia is a term in Law Latin that means "out of kindness" or "as a favor."

For example, if a judge decides to reduce a defendant's sentence out of kindness, they may do so a gratia.

A gratia is used to describe a decision or action that is made as a favor or act of kindness, rather than because it is required by law or obligation. It is often used in legal contexts to describe a decision made by a judge or other legal authority that is not strictly required by the law, but is done as a gesture of goodwill or compassion.

The example of a judge reducing a defendant's sentence a gratia illustrates this concept, as the judge is not required by law to reduce the sentence, but is doing so out of kindness or compassion for the defendant.