'asperser' originates from Latin, specifically the word 'aspergere', where 'ad-' meant 'to' and 'spargere' meant 'to scatter' or 'to sprinkle'.

'asperser' developed from Latin 'aspergere' (to sprinkle, besmirch) and passed into English via Medieval/Old French and Late Latin forms, eventually becoming the modern English agent noun formed from the verb 'asperse'.

Initially related to the literal sense 'to sprinkle' or 'to besprinkle', the sense shifted metaphorically to 'to stain or soil (reputation)', leading to the agent noun meaning 'one who defames'.