Sentence:  It was Giselle , the fille de chambre , come to clean the room , and while she stood before him with <WSD>ears</WSD> pricked up and regard all curiosity , explaining her errand , Alex could see from the corner of his eye the doctor doing all he could to calm the displeased bird . 
Meaning of the word marked with <WSD> tags:  the sense organ for hearing and equilibrium