verb.
To snarl or growl; to gnar.
noun.
A knot in wood; a large or hard knot, or a protuberance with twisted grain, on a tree.
noun.
Something resembling a knot in wood, such as in stone or limbs.
noun.
The average value of the magnitude squared of the curl of a vector field over a continuous path that is tangent to the vector field at every point. In mathematical notation, gnarl is represented by the lowercase Greek letter ΞΎ.
verb.
To knot or twist something.