Sentence:  Astronomers have discovered a double-star system in which the two members of the pair are just 80,000 miles apart — one-third the distance between Earth and the moon — and the smaller, locked into a “<WSD>death grip</WSD>,” zooms around the larger at the surprising rate of once every 11 minutes. 
Meaning of the word marked with <WSD> tags:  A grip that kills.