Sentence:  ... Harcourt Street combined within its precincts all the <WSD>undesirablenesses</WSD> that had existed separately in all the other streets she had visited. It was old and dirty, noisy yet dull, swarming with children, and overrun with costermongers, hand-organs, and cats. 
Meaning of the word marked with <WSD> tags:  An undesirable quality or thing.