'bareheadedness' originates from English, formed from the compound 'bareheaded' plus the nominalizing suffix '-ness', where 'bare' meant 'without covering' and 'head' meant 'head'.

'bare' comes from Old English 'bær' and 'head' from Old English 'heafod'; the compound 'bareheaded' arose in Middle English and later took the suffix '-ness' (from Old English '-nysse') to form 'bareheadedness'.

Initially the component words signified 'without covering' and 'head', and their combined meaning as 'the state of having the head uncovered' has remained essentially the same into modern usage.