Insincerity (noun)

1. The quality of being insincere; lack of sincerity.
2. The act of not being truthful or straightforward.

Origin:

This word is formed by the combination of the prefix "in-" meaning "not" and the word "sincerity" meaning "the quality of being truthful and straightforward".

Examples:

1. His insincerity was obvious in his false promises.
2. The insincerity of the candidate was shown in their flip-flopping on the issues.
3. The insincerity of the apology was clear in their lack of remorse.
4. The insincerity of the employee was shown in their lack of effort.
5. Her insincerity was shown in her insincere smile.