canker
n
1 [U] disease that destroys the wood of plants and trees (植物的)潰瘍病.
2 [U] disease causing ulcerous sores on the ears of animals, esp dogs and cats (動物耳部的)潰瘍(尤指貓狗).
3 [C] (fig 比喻) evil or dangerous influence that spreads and corrupts people (蔓延并腐蝕人們的)禍害, 禍患, 禍根
Drug addiction is a dangerous canker in society. 吸毒成癮是腐蝕社會的一大禍害. Cf 參看 cancer 2. canker, v [Tn]
infect or corrupt (sb) with canker 使(某人)患潰瘍; 腐蝕(某人).