Explanation:

- Word: Rescind

- Definition: To cancel, revoke, or repeal a law, order, or agreement.

- Option 1: Revoke

- Meaning: To officially cancel or annul a decision or agreement.

- ?? Correct Answer: Rescind and revoke are synonymous; both mean to officially cancel something.

- Option 2: Sign

- Meaning: To write one's name on a document or agreement as a form of approval.

- Not a synonym for rescind; it implies approval.

- Option 3: Validate

- Meaning: To confirm or prove the truth or legality of something.

- Opposite of rescind; it strengthens rather than cancels.

- Option 4: Accredit

- Meaning: To give official authorization or approval.

- Not a synonym; it denotes approval rather than annulment.