insincerity

/ˌɪnsɪnˈsɛrəti/
noun
  1. The quality of being dishonest or not genuine in expressing feelings or opinions.
    • The company's apology was full of insincerity and did nothing to fix the problem.
    • She hated the insincerity of small talk at formal parties.
    • I could sense the insincerity in his compliments about my cooking.
Antonyms