can·ker /ˈkæŋkə $ -ər/ noun [countableC, uncountableU] 1 EFFECT/INFLUENCEan evil influence that spreads quickly among people and is difficult to destroy 邪恶,祸害,腐败 the canker of violence in modern society 现代社会的祸患——暴力行为
2. MIHBPa disease that affects trees or plants 〔花木的〕枝枯病,根瘤病