1. deeply sincere and genuine; coming from one's true feelings

Examples

• She gave a heartfelt apology for her mistake.
• The family received heartfelt condolences from their neighbors.
• His heartfelt speech moved the entire audience to tears.
• We offer our heartfelt thanks for your generous donation.
• The letter contained heartfelt words of encouragement.
• Her heartfelt concern for others made her a beloved teacher.