不及物动词

名词

1. 祸患;恶痈
A canker is something evil that spreads and affects things or people.

2. (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.

1. a pernicious and malign influence that is hard to get rid of

e.g. racism is a pestilence at the heart of the nation
according to him, I was the canker in their midst

Synonym: pestilence

2. an ulceration (especially of the lips or lining of the mouth)

Synonym: canker sore

3. a fungal disease of woody plants that causes localized damage to the bark