The present participle of stop, meaning to cease movement or operation.

रुक जाना

English Usage: She is stopping the car right now.

Hindi Usage: वह अभी कार रोक रही है।

The act of stopping something or ceasing to function.

रोकना

English Usage: The stopping of the train was sudden.

Hindi Usage: ट्रेन का रुकना अचानक था।