Learn how to say Speciousness correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word specious:
superficially plausible, but actually wrong:
a specious argument
misleading in appearance, especially misleadingly attractive:
the music trade gives Golden Oldies a specious appearance of novelty
late Middle English (in the sense ‘beautiful’): from Latin speciosus ‘fair’, from species (see species)