The word 'unusually-structured' is a compound adjective formed by combining 'unusually' and 'structured'. 'Unusually' originates from 'usual', which comes from Latin 'usualis', meaning 'customary'. 'Structured' comes from 'structure', which originates from Latin 'structura', meaning 'a fitting together, building'.

'Unusually' evolved from Middle English 'usual', and 'structured' evolved from Middle English 'structuren'.

Initially, 'unusually' meant 'not usual', and 'structured' meant 'arranged in a definite pattern'. The combined form retains these meanings.