Sentence:  They hurled a <WSD>cement</WSD> barge against a freighter in Honolulu Harbor , knocked down telephone lines , marooned automobiles , flooded lawns , killed six cows . 
Meaning of the word marked with <WSD> tags:  a building material that is a powder made of a mixture of calcined limestone and clay; used with water and sand or gravel to make concrete and mortar