I owe you a sincere and unreserved apology.

Meaning

Offering a completely honest and heartfelt apology.

Examples

• John: 'Your trust has been severely undermined by my actions.'<br>
• Alice: '<b>I owe you a sincere and unreserved apology.</b> I hope you can eventually forgive me.'
• John: '<b>I owe you a sincere and unreserved apology.</b> I'll do everything in my power to rectify the situation.'
• Alice: 'The project's success was jeopardized by my error.'<br>