Sentence:  Although she weighed only 108 pounds when she visited him , Carroll permitted her to go on a 10 - day fast in which she took nothing but <WSD>water</WSD> . 
Meaning of the word marked with <WSD> tags:  binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent