A more thorough explanation:

Forbarre (for-bahr), verb. [Law French] Historical term meaning to preclude, to bar out, or to estop.

1. The defendant's previous conviction for the same crime forbarred him from using the defense of innocence.

2. The terms of the contract forbarred the company from disclosing confidential information to third parties.

These examples illustrate how the term forbarre is used in a legal context to indicate that something is prohibited or prevented. In the first example, the defendant's previous conviction precluded him from using a certain defense. In the second example, the terms of the contract barred the company from disclosing confidential information.