Sentence:  But if anything can bring home to Mr. Khrushchev the idea that he will not really get much enjoyment from watching this Braddock-against-the-Indians contest , it will probably be the fact that SEATO forces are ready to attempt it - plus the fact that Moscow has something to lose from <WSD>closing</WSD> off disarmament and other bigger negotiations with Washington . 
Meaning of the word marked with <WSD> tags:  stem the flow of