Select the most appropriate synonym of the given word.

Testify

Affirm

The most appropriate synonym of the given word is affirm.

• Testify means "to declare or assert something in a formal way, especially under oath."
• Oppose means "to disagree with or resist something."
• Disprove means "to show that something is not true."
• Affirm means "to state or declare something positively or forcefully."
• Invalidate means "to make something invalid or ineffective."