1. knuckle - Noun
2. knuckle - Verb
The joint of a finger, particularly when made prominent by the closing of the fingers.
The kneejoint, or middle joint, of either leg of a quadruped, especially of a calf; -- formerly used of the kneejoint of a human being.
The joint of a plant.
The joining pars of a hinge through which the pin or rivet passes; a knuckle joint.
A convex portion of a vessel's figure where a sudden change of shape occurs, as in a canal boat, where a nearly vertical side joins a nearly flat bottom.
A contrivance, usually of brass or iron, and furnished with points, worn to protect the hand, to add force to a blow, and to disfigure the person struck; as, brass knuckles; -- called also knuckle duster.
To yield; to submit; -- used with down, to, or under.
To beat with the knuckles; to pommel.
Source: Webster's dictionaryThe moon is no door. It is a face in its own right, White as a knuckle and terribly upset. It drags the sea after it like a dark crime; it is quiet With the O-gape of complete despair. I live here. Sylvia Plath
You have to really be courageous about your instincts and your ideas. Otherwise you'll just knuckle under, and things that might have been memorable will be lost. Francis Ford Coppola
I think I'm done gunnin to get closer. To some imagined bliss. I gotta knuckle down. And just be ok with this. Ani DiFranco
Hans had courage to burn. If he had been willing to knuckle under to the Nazis he would have stayed at Kaiser Wilhelm Institute. But Hans was a scientist. He wouldn't trim his notion of truth to fit political gangsters. Robert A. Heinlein
I like to knuckle down and get on with my job. I'll make mistakes, I'm bound to, but I'll write them down and I'll learn from them. Paul Ince
Akri won't let me eat any of them nasty gods. What's the world coming to when a demon gots to beg for tidbits... not eve a finger sandwich or a single knuckle. Tragic. Terribly tragic. Sherrilyn Kenyon