The quality or state of being gnarled; the twisted, knotted appearance of something, or the intensity and extremeness of an action.
From 'gnarl' plus the abstract noun suffix '-ness,' creating a noun describing the quality of being twisted, or in slang, the quality of being radical or extreme.
The gnarliness of a tree is literally measurable—scientists study the stress patterns in gnarled wood to understand what environmental pressures shaped it, turning twisted knots into data about climate history.
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