Sentence:  They sat looking out at the dark, at the square of light the kitchen lantern threw on the ground outside the door, with a <WSD>hunched</WSD> shadow of Grampa in the middle of it. 
Meaning of the word marked with <WSD> tags:  To raise (one's shoulders) (while lowering one's head or bending the top of one's body forward); to curve (one's body) forward ("sometimes followed by" up).