Meaning of niaiserie in English:

niaiserie

(also niaisery)

Pronunciation /nɪˈeɪz(ə)ri/

noun

literary
  • Simplicity; foolishness; (in later use) especially an instance of this.

Origin

Mid 17th century; earliest use found in John Sergeant (1623–1707), Roman Catholic controversialist and philosopher. From French niaiserie from niais simple, foolish + -erie.