IPA: /ɪnˈtɜːrʌptər/
KK: /ɪnˈtɜːrʌptər/
A device or person that interrupts or stops a process or action.
The interruptor stopped the flow of electricity when the circuit was overloaded.
Interruptor → It is formed from "inter-" (meaning between) and "rumpere" (meaning to break). The word refers to something that breaks in between a process or flow, hence an interruptor is a device that breaks the flow of electricity.
Picture a device that 'breaks' ('rumpere') the flow 'between' ('inter-') circuits — that's why an interruptor is used to stop or interrupt the flow of electricity.