gnarling
Webster's Dictionary (GCIDE)
Gnarl \Gnarl\, v. i. [imp. & p. p. Gnarled; p. pr. & vb. n. Gnarling.] [From older gnar, prob. of imitative origin; cf. G. knarren, knurren. D. knorren, Sw. knorra, Dan. knurre.] To growl; to snarl. [1913 Webster]
And wolves are gnarling who shall gnaw thee first. --Shak. [1913 Webster]