Related Clues:

• Incorruptible
• "No lie!"
• "Cross my heart!"
• 'For real!'
• 'No lie'
• ''I kid you not!''
• "It's the truth!"
• ''It's true!''
• ''Truly!''
• ''That's a fact!''
• "No, really!"
• Insistent affirmation
• 'That's true!'
• Truthful
• 'This is on the level'