'blameworthiness' originates from the English word 'blameworthy', which is derived from the word 'blame' combined with the suffix '-worthy', indicating deserving of blame.

'blameworthy' evolved from the Old English word 'blaman', which meant 'to find fault with', and the suffix '-worthy', which has been used in English since the Middle Ages to denote deserving of a particular quality.

Initially, it meant 'deserving of blame', and this meaning has largely remained the same in modern usage.