fallacious
1. [ adjective ] intended to deceive
Synonyms: fraudulent deceitful
Examples:

"deceitful advertising" "fallacious testimony" "smooth, shining, and deceitful as thin ice" - S.T.Coleridge "a fraudulent scheme to escape paying taxes"

Related terms: dishonest
2. [ adjective ] containing or based on a fallacy
Synonyms: unsound
Examples:

"fallacious reasoning" "an unsound argument"

Related terms: invalid
3. [ adjective ] based on an incorrect or misleading notion or information
Examples:

"fallacious hope"

Related terms: incorrect
Similar spelling:   Falgoust