English to English

noun (n)

• the quality of not being open or truthful; deceitful or hypocritical(noun.attribute)

  Synonym:
  falseness, hollowness
  Antonym:
  sincerity
  

  source: wordnet30
• 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.(noun)

  source: webster1913