'irregularly-structured' originates from the combination of 'irregularly' and 'structured', where 'irregularly' comes from Latin 'irregularis', meaning 'not regular', and 'structured' from Latin 'structura', meaning 'a fitting together, building'.

'irregularis' transformed into the Old French word 'irregulier', and eventually became the modern English word 'irregular'. 'Structura' evolved into the Old French 'structure', and eventually became the modern English word 'structure'.

Initially, 'irregular' meant 'not following a rule', and 'structure' meant 'a building or arrangement'. Over time, 'irregularly-structured' evolved to mean 'having a non-uniform arrangement'.