The action of running an engine while it is not in gear or not being used.

मंडल करना

English Usage: He was idling the car while waiting for his friend.

Hindi Usage: वह अपने दोस्त का इंतज़ार करते हुए कार मंडल कर रहा था।

The act of being inactive or not engaging in work.

निष्क्रियता

English Usage: The idling of the machine led to delays in production.

Hindi Usage: मशीन की निष्क्रियता के कारण उत्पादन में देरी हुई।