Whur (?), n. A humming or whirring
sound, like that of a body moving through the air with velocity; a
whir.
Whur (?), v. i. [Probably of imitative
origin. Cf. 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.