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Use "knuckly" in a sentence
"Like a 3D image of a hand only with the fingers curled into a fist, so it's just a big fricking knuckly lump if you're looking at the outline and a ball of bones all folded over one another if you're looking at the skeleton."
"He shook it with his callused, knuckly one, and with that they established their truce."
"His fists were balled into knuckly knots at his sides."