'aristodemocratical' originates from a modern English coinage combining Greek elements via New Latin: 'aristo-' (from Greek 'aristos') meaning 'best' and 'democratical' (from Greek 'demos' + 'kratos') meaning 'people' + 'rule'.

'aristodemocratical' developed in English by combining the prefix 'aristo-' (as in 'aristocracy') with the adjective 'democratical' (an older form of 'democratic'), reflecting earlier usages of 'democratical' in 17th–19th century English; the compound formation produced the sense 'both aristocratic and democratic'.

Initially, as a coinage, it meant 'pertaining to both aristocracy and democracy'; over time it has remained a rare, descriptive adjective with that same core meaning and has not undergone major semantic shift.