say it: fuh-SEE-shuh-slee
facetiously is an adverb meaning "not seriously". It is pronounced /fəˈsiʃəsli/ — fuh-SEE-shuh-slee. It carries one recorded sense.
Definitions, synonyms and semantic relations for facetiously 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.