'diluteness' originates from English, formed from 'dilute' + suffix '-ness', where 'dilute' originates from Latin 'diluere' meaning 'to wash away; to dilute'.

'diluteness' derives from the adjective/verb 'dilute', which comes from Latin 'diluere' (to wash away). The Latin verb influenced Old French and later Middle English forms (e.g. Middle English 'diluten'), and eventually the modern English 'dilute' and the derived noun 'diluteness'.

Initially related to the action 'to wash away' or 'to spread out', the sense shifted toward 'making less concentrated' and now specifically denotes a reduced concentration or lack of intensity.