The act of moving something, especially a wing, back and forth.

कुछ को आगे-पीछे हिलाना

English Usage: The child was flapping his arms like a bird.

Hindi Usage: बच्चा पक्षी की तरह अपने हाथों को आगे-पीछे हिला रहा था।

The action of moving in a quick motion, usually referring to wings or flags.

तेजी से हिलाना

English Usage: The flapping of the bird's wings was a beautiful sight.

Hindi Usage: पक्षी के पंखों का तेजी से हिलाना सुंदर منظر था।