whir

The whir of the circling NYPD helicopter muffled their chants calling for unity and calling out police brutality.

As we approach the rumble of guns grows louder and alternates with the whir of cannonballs, which begin to attract his attention.

You can almost hear the gears whir: Kagan offers the most liberalism for the longest time at the lowest political cost.

For a few seconds the silence was unbroken save for a whir of a taxicab passing outside.

Both had heard the well-remembered whir at the same moment, and bounded away several steps before pausing to look back.

Suddenly some birds arose with a great whir of wings, and alighted in a tree.

She heard the whir of a machine, fast and then slow again, near and then at a distance.

Then, from out of the darkness, came something that moved on a whir of caterpillar treads.