1N-COUNT 祸患;恶痈 A canker is something evil that spreads and affects things or people. 祸患;恶痈 [formal]
...the canker of jealousy. [+ of]
嫉妒作祟
2N-VAR (灌木、树木的)溃疡病;枯枝病Canker is a disease which affects the wood of shrubs and trees, making the outer layer come away to expose the inside of the stem. (灌木、树木的)溃疡病;枯枝病
In gardens, cankers are most prominent on apples and pear trees.