Gnarl
Gnarl , intransitive verb
[From older gnar, prob. of imitative origin; compare German knarren, knurren. Dutch knorren, Swedish knorra, Danish knurre.]
To growl; to snarl.
And wolves are gnarling who shall gnaw thee first.
Gnarl , noun
[See Gnar, n.]
a knot in wood; a large or hard knot, or a protuberance with twisted grain, on a tree.