Sentence:  The water in Thor 's big swimming pool had been covered with a blanket of thick , foamy soapsuds - fashioned , of course , from ZING - Joyce had dived from the board into the <WSD>pool</WSD> , then swirled and cavorted in her luxurious `` bath '' while cameras rolled . 
Meaning of the word marked with <WSD> tags:  an excavation that is (usually) filled with water