gangrene

如果不及时治疗，伤口可能会感染并导致坏疽。

If left untreated, the wound may get infected and lead to ___gangrene.

这个社区的犯罪活动像坏疽一样腐蚀着整个地区的道德风气。

The criminal activities in this neighborhood are like ___gangrene rotting the moral fabric of the entire area.