Sentence:  Pond <WSD>water</WSD> can be filtered for human use , but most part-time farmers would not want to go to so much trouble . 
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