'dearness' originates from Old English, specifically the word 'dēore,' where 'dēor' meant 'precious' or 'valuable.'

'dēore' transformed into the Middle English word 'dere,' and eventually became the modern English word 'dear' with the suffix '-ness' to form 'dearness.'

Initially, it meant 'preciousness or value,' but over time it evolved into its current meanings of 'high cost' and 'cherished quality.'