nod-

nod-

prefix meaning "knot": nodal, nodose, nodulus.
References in classic literature ?
A desire to impress the mind of his companion with the importance of the resolution he had made came over him and he nod- ded his head toward the house.
Still, they saw no hesitation in each other's faces, and they nod- ded a mute and unprotesting assent when a shag- gy man near them said in a meek voice: "We'll git swallowed.