Slum (noun)

1. A densely populated, run-down urban area, characterized by poverty, substandard housing, and a lack of basic services.
2. A neighborhood of poor people, especially in a city.
3. A place or area that is characterized by poverty, squalor, and neglect.

Origin:

From middle english slum, from old english slum, from proto-germanic *slumaz ("muddy place"), from proto-indo-european *slud- ("muddy").

Examples:

1. The slum was a breeding ground for crime.
2. He grew up in a slum and never had a chance.
3. The government demolished the slum to build a new housing development.
4. The slum was filled with dilapidated buildings.
5. The slum was a dangerous place to live.