Wiktionary
n. (plural of insincerity English)
Wikipedia
Insincerities, also known as Four Insincerities, is a solo modern dance work created by Martha Graham. The piece consists of four sections: Petulance, Remorse, Politeness and Vivacity performed to music by Serge Prokofiev. It premiered on January 20, 1929, at the Booth Theatre in New York City. Louis Horst accompanied Graham on piano.
Usage examples of "insincerities".
His genius for soothing insincerities was well known but seldom failed to convince at the time.
But mechanical invention had gone faster than intellectual and social organisation, and the world, with its silly old flags, its silly unmeaning tradition of nationality, its cheap newspapers and cheaper passions and imperialisms, its base commercial motives and habitual insincerities and vulgarities, its race lies and conflicts, was taken by surprise.
I am no great hand at polite insincerities, and give you credit for believing you cannot wish to figure as inconsolable.