'irregularly-refused' originates from the combination of 'irregularly' and 'refused', where 'irregularly' comes from Latin 'irregularis', meaning 'not regular', and 'refused' from Latin 'refusare', meaning 'to reject'.

'irregularly' changed from the Latin word 'irregularis' and 'refused' from 'refusare', eventually forming the modern English compound 'irregularly-refused'.

Initially, 'irregularly' meant 'not regular', and 'refused' meant 'to reject'. The compound term 'irregularly-refused' maintains these meanings in its current usage.