Part of speech: Noun
something twisted and tight and swollen
Example: their muscles stood out in knots; the old man's fists were two great gnarls; his stomach was in knots
Part of speech: Verb
twist into a state of deformity
Example: The wind has gnarled this old tree
Part of speech: Verb
make complaining remarks or noises under one's breath
Example: she grumbles when she feels overworked