'mechanicalness' originates from English, specifically the word 'mechanical' combined with the suffix '-ness', where 'mechanical' comes via Latin 'mechanicus' from Greek 'mēkhanē' and 'mēkhanikos' (from 'mēkhanē') meant 'device' or 'machine'.

'mechanicalness' changed from the adjective 'mechanical' (from Latin 'mechanicus' and Greek 'mēkhanikos') with the Old English/West Germanic noun-forming suffix '-ness' (Old English '-nes(s)'), and eventually became the modern English noun 'mechanicalness' as a formation to denote the state or quality.

Initially, 'mechanical' primarily meant 'pertaining to machines or tools'; over time related senses developed, and 'mechanicalness' has come to mean both 'the condition of being machine-like' and figuratively 'automatic or unthinking routine'.