whur

CIDE DICTIONARY

whur, v. i. [Probably of imitative origin. Cf. Hurr, Hurry, Whir.].

•  To make a rough, humming sound, like one who pronounces the letter r with too much force; to whir; to birr.  [1913 Webster]
•  To snarl or growl, as a dog.  Halliwell.  [1913 Webster]

whur, n. 

 A humming or whirring sound, like that of a body moving through the air with velocity; a whir.  [1913 Webster]