knot, gnarl -- (something twisted and tight and swollen; "their muscles stood out in knots"; "the old man's fists were two great gnarls"; "his stomach was in knots")
Overview of verb gnarl
The verb gnarl has 2 senses
gnarl -- (twist into a state of deformity; "The wind has gnarled this old tree")
murmur, mutter, grumble, croak, gnarl -- (make complaining remarks or noises under one's breath; "she grumbles when she feels overworked")
(Sound)
