English
falsism
From fals(e) + -ism, modelled after truism.
Formed from false + -ism
Latin fallō ‘to deceive’
Latin falsus ‘counterfeit, false’
Old English fals ‘false; fraud’
Middle English false
English false
Today it means
noun A claim that is self-evidently false, commonly used a rhetorical device.
Language periods are conventional ranges, not dates for this word.
Etymograph / falsism