Sentence:  Miss Pulova has a voice that Maria Callas once described as `` like chipping teeth with a screw driver '' , and her round , opalescent <WSD>face</WSD> becomes fascinatingly reflective of the emotions demanded by the role of Rosalie . 
Meaning of the word marked with <WSD> tags:  the front of the human head from the forehead to the chin and ear to ear