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.
© Webster 1913.
Whur (?), n.
A humming or whirring sound, like that of a body moving through the air with velocity; a whir.
© Webster 1913.