insincerity Meaning, Definition & Usage

  1. noun the quality of not being open or truthful; deceitful or hypocritical
    falseness; hollowness.

WordNet

In`sin*cer"i*ty noun
Etymology
Cf. F. insincérité.
Definitions
  1. The quality of being insincere; want of sincerity, or of being in reality what one appears to be; dissimulation; hypocritical; deceitfulness; hollowness; untrustworthiness; as, the insincerity of a professed friend; the insincerity of professions of regard.
    What men call policy and knowledge of the world, is commonly no other thing than dissimulation and insincerity. Blair.

Webster 1913