say it: fuh-LAY-shuhs
fallacious is an adjective meaning "containing or based on a fallacy". It carries 3 recorded senses.
intended to deceive
“deceitful advertising”
“fallacious testimony”
“smooth, shining, and deceitful as thin ice”
“a fraudulent scheme to escape paying taxes”
Definitions, synonyms and semantic relations for fallacious come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.