6 adjectives to describe whirrs

There's many a time, an' I don't know why, That I shoot too low or I aim too high, An' all I can see is the distant whirr Of a bird that's gittin' back home to her Yep, gittin' back home at the end o' day, An' I'm just as glad that he got away.

Then, the next time Holroyd maltreated him, Azuma-zi went presently to the Lord of the Dynamos and whispered, "Thou seest, O my Lord!" and the angry whirr of the machinery seemed to answer him.

But the searchlight's brilliant beam followed relentlessly, and as the two smart little craft cleared from the area of the black smoke cloud, there came the ringing report of a 6-inch gun followed by the familiar whirr of a heavy shell.

The trees can't go naked all the year; the brook can't keep ice on it in summer; the swan sings before it dies; the grasshopper whirrs loudest when its grave is ready.

One with loud whirr of wings flew away.

A rapid whirr due to the engines, and a rythmical clatter due to the relief valve on one of the port engine cylinders not being screwed down hard enough, and therefore lifting a little in its seat at each stroke, made the most of it.

6 adjectives to describe  whirrs