'electromechanical' originates from the combination of 'electro-' from 'electric' and 'mechanical' from 'mechanic', where 'electro-' refers to electricity and 'mechanical' refers to machinery.

'electromechanical' changed from the combination of 'electro-' and 'mechanical' in the 19th century and eventually became the modern English word 'electromechanical'.

Initially, it meant 'relating to the interaction of electrical and mechanical processes', and this meaning has largely remained the same in modern usage.