Whur
Whur , intransitive verb
[Probably of imitative origin. Compare Hurr, Hurry, Whir.]
1.
To make a rough, humming sound, like one who pronounces the letter r with too much force; to whir; to birr.
2.
To snarl or growl, as a dog. — Halliwell
Whur , noun
A humming or whirring sound, like that of a body moving through the air with velocity; a whir.