degenerate [dɪˈdʒenəreɪt]

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vi.退步，堕落；vt.使退化；恶化；adj.退步的，堕落的；n.堕落者

to become worse in quality

He didn't let riches and luxury make him degenerate. 他不因财富和奢华而自甘堕落。
Will too much freedom make them degenerate? 太多的自由会令他们堕落吗？