canker

名词 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)
   同义词：canker sore
3. a pernicious and malign influence that is hard to get rid of
   同义词：pestilence

动词 canker:

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

1. Drug addiction is a dangerous canker in society.
   吸毒成瘾是腐蚀社会的一大祸害。

can.ker

n.（名词）
Ulceration of the mouth and lips.
口唇溃疡，口疮：口腔或嘴唇的溃疡
An inflammation or infection of the ear and auditory canal, especially in dogs and cats.
动物的中耳发炎：耳和耳道的发炎或感染，尤指在狗或猫的感染
A condition in horses similar to but more advanced than thrush.
马的疽疡症：马的类似于蹄间腐烂但较之更为严重的一种病况

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.
植物溃疡：植物一个部分，尤指一株木本植物的主干、枝干或小枝上局部的患病或坏死区域，通常由真菌或细菌造成
Any of several diseases of plants characterized by the presence of such lesions.
植物溃疡：以这种损害的存在为特征的几种植物的疾病的任一种
A source of spreading corruption or decay.
腐败的原因：传布腐败或腐朽的根源
v.（动词）
can.kered,can.ker.ing,can.kers
v.tr.（及物动词）
To attack or infect with canker.
使患溃疡：以溃疡攻击或感染
To infect with corruption or decay.
使腐败：传染腐化或腐朽
v.intr.（不及物动词）
To become infected with or as if with canker.
受到溃疡感染：被溃疡感染的或仿佛被溃疡感染

来源：
Middle English
中古英语
from Old English cancer
源自 古英语 cancer
and from Old French cancre
并源自 古法语 cancre
both from Latin cancer * see kar-
都源自 拉丁语 cancer *参见 kar-