Related Clues:

• Proven
• 'No problem!'
• 'Of course!'
• 'Let's do it!'
• Never-failing
• 'No sweat'
• 'Oh, what the hell'
• Convinced
• 'You bet'
• Word of agreement
• Unwavering
• 'You betcha'
• 'Without a doubt!'
• No doubt about it
• 'Absolutely!'