"impudently" in the adverb sense
1. impertinently, saucily, pertly, freshly, impudently
in an impudent or impertinent manner
"a lean, swarthy fellow was peering through the window, grinning impudently"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License