Sentence:  Through the stir and motion of the commoner streets; through the roar and <WSD>jar</WSD> of many vehicles, many feet, many voices; with the blazing shop-lights lighting him on, the west wind blowing him on, and the crowd pressing him on; he is pitilessly urged upon his way, and nothing meets him, murmuring, "Don't go home!" 
Meaning of the word marked with <WSD> tags:  A quivering or vibrating movement or sensation resulting from something being shaken or struck.