'manually-powered' originates from the combination of 'manual' and 'powered', where 'manual' comes from Latin 'manualis', meaning 'of the hand', and 'powered' from 'power', meaning 'to supply with energy'.

'manual' changed from the Latin word 'manualis' and eventually became the modern English word 'manual'. 'Powered' evolved from the Old French word 'poeir', which became 'power' in Middle English.

Initially, 'manual' meant 'of the hand', and 'powered' meant 'to supply with energy'. Together, they evolved to mean 'operated by human effort'.