Sentence:  The latest battle over the <WSD>R-word</WSD> kicked into high gear with a Jan. 26 Wall Street Journal report that last summer White House Chief of Staff Rahm Emanuel blasted liberal activists unhappy with the pace of health-care reform, deriding their strategies as "[expletive] retarded." 
Meaning of the word marked with <WSD> tags:  The word "retard", regarded as a vulgar or taboo word.