Sentence:  Just as it appeared Arsenal had taken the <WSD>sting</WSD> out of the tie, Johnson produced a moment of outrageous quality, thundering a bullet of a left foot shot out of the blue and into the top left-hand corner of Wojciech Szczesny's net with the Pole grasping at thin air. 
Meaning of the word marked with <WSD> tags:  The harmful or painful part of something.