whir

The machine began to whir as it powered up.

The helicopter blades whirred loudly above us.

I could hear the whir of the fan in the background.

The drone's propellers whirred as it flew overhead.

The whir of the sewing machine filled the room.

The computer's cooling fan began to whir after a long period of use.

As the wind picked up, the leaves began to whir around in the air.

The electric mixer whirred as it mixed the ingredients for the cake.

The blender whirred loudly as it pureed the fruits.

The air conditioner's compressor whirred to life on a hot summer day.

No Fawkes the phoenix - no whirring silver contraptions.

Large fans whirred to try to cool the room.

The whir of the automatic window unrolling made me turn.

The blades whir to a halt, and some people step out.

The delicate silver instruments stood again upon the spindle-legged tables, puffing and whirring serenely.

She makes tiny whirring sounds with her lips to irritate her husband.

And then for several hours the recorder whirred silently on, recording nothing.

Peter heard something new, a kind of whirring sound ... like an engine.

The greeting and reply were scarcely over when another quail whirred under the bush, and another, and still another.

Instead of the buzz of conversation, there's the whirring noise of the robot.