specious Definition

specious
adj

1. Superficially or apparently convincing, sound or just, but really false, flawed or lacking in sincerity.

Example: specious arguments
Thesaurus: deceptive, misleading, fallacious, false, counterfeit, sophistic, unsound; Antonym: valid, true.
2. Outwardly attractive but possessing no real intrinsic value.

Derivative: speciosity
noun

Derivative: speciously
adverb

Derivative: speciousness
noun

Etymology: 14c: from Latin speciosus fair or beautiful, from species species.