'barefacedness' originates from English, specifically the word 'barefaced' plus the suffix '-ness', where 'bare' meant 'naked' or 'uncovered' and 'face' meant 'face'.

'barefaced' changed from Middle English word 'bare-faced' and eventually became the modern English word 'barefaced'; the abstract noun 'barefacedness' developed by adding the nominalizing suffix '-ness'.

Initially, it meant 'having an uncovered or bare face', but over time it evolved into its current meaning of 'shameless or brazen behavior'.