Sentence:  And when he was alone again in the cabin , Alexander lowered his head into his <WSD>arms</WSD> and wept , for he knew full well what must be done , what in the end would be done . 
Meaning of the word marked with <WSD> tags:  a human limb; technically the part of the superior limb between the shoulder and the elbow but commonly used to refer to the whole superior limb