'irregularly-gathered' originates from the combination of 'irregularly' and 'gathered', where 'irregularly' is derived from Latin 'irregularis', meaning 'not regular', and 'gathered' from Old English 'gadrian', meaning 'to bring together'.

'irregularly' changed from the Latin 'irregularis' to the Middle English 'irreguler', and 'gathered' evolved from Old English 'gadrian' to the modern English 'gather'.

Initially, 'irregularly' meant 'not regular', and 'gathered' meant 'to bring together'. The combined term 'irregularly-gathered' retains the meaning of being collected in a non-uniform manner.