Sentence:  Harold put a teaspoonful of powdered coffee in his cup and filled it with hot <WSD>water</WSD> , and then , stirring , he sat back in his chair . 
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