The frunk is a trunk that's located at the front of the EV, where the engine would normally be housed in a traditional internal combustion engine car. The word comes from "front"+"trunk".
Not all EVs have frunks, but a lot of them do, since there's no big internal combustion engine to house in the front 'box' of the car. We list the frunk's capacity, in volume, in liters (l) or cubic feet, depending on which model is sold where. If there is no frunk, that will be mentioned too.