'irregularly-adjusted' originates from the combination of 'irregularly' and 'adjusted'. 'Irregularly' comes from 'irregular', which is derived from Latin 'irregularis', meaning 'not regular'. 'Adjusted' comes from 'adjust', which is derived from Old French 'ajuster', meaning 'to bring into line'.

'Irregularly' evolved from the Latin 'irregularis' through Middle English, while 'adjusted' evolved from Old French 'ajuster' through Middle English 'ajusten'.

Initially, 'irregularly' meant 'not regular', and 'adjusted' meant 'brought into line'. The combined term 'irregularly-adjusted' retains these meanings, indicating something not consistently aligned.