Sentence:  Geely grunted and slid partly out , and Shayne 's left arm <WSD>snaked</WSD> in around his neck to help him , while he set himself solidly on the roadway and swung his right fist to the big , gum-chewing jaw before Geely could straighten up . 
Meaning of the word marked with <WSD> tags:  move smoothly and sinuously, like a snake