IPA: /ˈsɜːr.tʃɑːrdʒ/
KK: /ˈsɜrˌtʃɑrɡ/
An extra amount of money added to the usual price or cost of something.
The restaurant added a surcharge to the bill for large groups.
To charge someone an extra amount of money on top of the usual price.
The company decided to surcharge customers for late payments.
Past: surcharged
Past Participle: surcharged
Surcharge is formed from "sur-" (meaning over or above) and "charger" (from Old French, meaning to load or charge). The word describes an additional charge or fee that is added on top of the original amount.
Think of an extra fee that is 'over' ('sur-') the original cost, as if you are 'loading' ('charger') on more expenses.