IPA: /ˈbɛəˌfeɪstli/
KK: /ˈbɛrˌfeɪstli/
In a way that is shameless or brazen, showing no embarrassment or modesty.
He barefacedly lied about his whereabouts last night.
Barefacedly → It is formed from "bare" (from Old English *bær*, meaning uncovered or exposed) and "faced" (from the root "face", which comes from Latin *facies*, meaning appearance or surface) and the adverbial suffix "-ly" (meaning in a manner of). The word "barefacedly" means in a manner that is openly shameless or without concealment, as if one's face is bare or exposed.
Think of being 'uncovered' ('bare') and showing your 'appearance' ('faced') openly — that's why barefacedly means doing something openly and shamelessly.