IPA: /ˈswɪtʃər/
KK: /ˈswɪtʃər/
A type of train engine that moves other trains around in a yard or station, helping to organize them.
The switcher moved the freight cars to the correct tracks for loading.
Switcher → It is formed from "switch" (from Old English *swiccan*, meaning to change or exchange) and "-er" (meaning a person who). A switcher is a person or device that changes or exchanges something.
Think of someone who 'changes' ('switch') something — the '-er' indicates that this person is doing the action.