名詞 canker:

1. a fungal disease of woody plants that causes localized damage to the bark
2. an ulceration (especially of the lips or lining of the mouth)
   同義詞：canker sore
3. a pernicious and malign influence that is hard to get rid of
   同義詞：pestilence

動詞 canker:

1. become infected with a canker
2. infect with a canker

1. Drug addiction is a dangerous canker in society.
   吸毒成癮是腐蝕社會的一大禍害。

can.ker

n.（名詞）
Ulceration of the mouth and lips.
口唇潰瘍，口瘡：口腔或嘴唇的潰瘍
An inflammation or infection of the ear and auditory canal, especially in dogs and cats.
動物的中耳發(fā)炎：耳和耳道的發(fā)炎或感染，尤指在狗或貓的感染
A condition in horses similar to but more advanced than thrush.
馬的疽瘍癥：馬的類似于蹄間腐爛但較之更為嚴(yán)重的一種病況

A localized diseased or necrotic area on a plant part, especially on a trunk, branch, or twig of a woody plant, usually caused by fungi or bacteria.
植物潰瘍：植物一個(gè)部分，尤指一株木本植物的主干、枝干或小枝上局部的患病或壞死區(qū)域，通常由真菌或細(xì)菌造成
Any of several diseases of plants characterized by the presence of such lesions.
植物潰瘍：以這種損害的存在為特征的幾種植物的疾病的任一種
A source of spreading corruption or decay.
腐敗的原因：傳布腐敗或腐朽的根源
v.（動詞）
can.kered,can.ker.ing,can.kers
v.tr.（及物動詞）
To attack or infect with canker.
使患潰瘍：以潰瘍攻擊或感染
To infect with corruption or decay.
使腐?。簜魅靖蚋?/br>v.intr.（不及物動詞）
To become infected with or as if with canker.
受到潰瘍感染：被潰瘍感染的或仿佛被潰瘍感染

來源：
Middle English
中古英語
from Old English cancer
源自 古英語 cancer
and from Old French cancre
并源自 古法語 cancre
both from Latin cancer * see kar-
都源自 拉丁語 cancer *參見 kar-