falsity

Concise Oxford English Dictionary © 2008 Oxford University Press:
false/fɔːls/

▶adjective

• 1 not according with truth or fact.

  ■ invalid or illegal: false imprisonment.

• 2 deliberately intended to deceive.

  ■ artificial.

• 3 not actually so; illusory.

  ■ used in names of plants, animals, and gems that superficially resemble the thing properly so called, e.g. false scorpion.

• 4 disloyal.

– phrases
play someone false deceive or cheat someone.

– derivatives
falsely adverb,
falseness noun,
falsity noun.

– origin OE fals ‘fraud’, from L. falsum ‘fraud’, neut. past part. of fallere ‘deceive’; reinforced or re-formed in ME from OFr. fals, faus ‘false’.