1. comparative form of sincere; more sincere, honest, or genuine
Usage: less common than ‘more sincere’

Examples

• His second apology seemed sincerer than his first.
• She appeared sincerer in her efforts to help this time.
• The candidate’s later statements were sincerer and more heartfelt.
• I’ve never met anyone sincerer than my grandmother.
• His sincerer approach to the problem impressed everyone.
• The author’s sincerer tone in the revised edition was well-received.