Meaning of the word "full of sincerity" in English

What does "full of sincerity" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

full of sincerity

US /fʊl ʌv sɪnˈser.ə.ti/
UK /fʊl ɒv sɪnˈser.ə.ti/
"full of sincerity" picture

Phrase

completely honest, genuine, and free from hypocrisy or deceit

Example:
His apology seemed full of sincerity, so I decided to forgive him.
She wrote a letter full of sincerity to express her gratitude.