spurious russian

• фальши́вый

  counterfeit, forged, fake, spurious

  insincere, false (of a smile), hypocritical

  out of tune, off-key

• подло́жный

  false, spurious, counterfeit

• парази́тный

  parasitic, spurious, stray, unwanted

  parasitic, of parasites

• подло́жность

  falseness, spuriousness

Examples

• Эксперт доказал подложность старинного документа.

  The expert proved that the old document was spurious.