'peakedness' originates from English, specifically formed from the adjective 'peaked' plus the noun-forming suffix '-ness', where 'peak' originally meant 'point' or 'summit'.

'peakedness' changed from the adjective 'peaked' (itself from the noun 'peak') and eventually became the modern noun 'peakedness' through addition of the suffix '-ness'. 'Peak' developed in Middle English from forms such as 'pēk'/'pike', ultimately from older Germanic or Old Norse sources meaning 'point'.

Initially, 'peak' primarily meant a physical 'point' or 'summit'; over time derivatives like 'peaked' and 'peakedness' came to describe both physical pointed shapes and figurative/maximal states (e.g., intensity or statistical sharpness).