fatuously
fat-u-ous-ly
adverb
In a foolishly self-satisfied or complacently silly and unintelligent manner.
"He smiled fatuously, unaware of his mistake."
Thesaurus
Synonyms: inanely
fat-u-ous-ly
In a foolishly self-satisfied or complacently silly and unintelligent manner.
"He smiled fatuously, unaware of his mistake."
Synonyms: inanely