'reduced-output' originates from Modern English, specifically a compound of 'reduced' (the past participle of 'reduce') and 'output'.

'reduced' comes from the past participle of 'reduce', which derives from Latin 'reducere' (re- 'back' + ducere 'to lead'). 'Output' is a compound of English 'out' + 'put'; as a technical noun 'output' developed in English from the 19th century use of 'put out' and later became a standard noun for production or result.

The elements originally had senses like 'lead back' (Latin root of 'reduce') and 'put out' (Old/Middle English elements), but in modern English combined in compounds like 'reduced-output' they mean 'output that has been made smaller' or 'producing less than normal'.