"Whir" is a term that often describes a continuous, rapid sound, similar to the noise made by machines or insects in motion. It can refer to the sound of a fan, a drone, or even the buzzing of a bee. This sound is typically associated with movement and can evoke a sense of speed or activity. In a broader context, "whir" can also be used to describe the action of something spinning or rotating quickly. For example, the blades of a helicopter or the wheels of a bicycle can create a whirring sound as they move. This term captures the essence of motion and the auditory experience that accompanies it.