rod 词根表示“咬”，来自 rat-老鼠
e-加强或引申意义
estop 禁止翻供；禁止；禁止反言
estrange使疏远

erode[i'rəud]
to rub or be rubbed away gradually
to slowly reduce or destroy
to gradually destroy the surface of something through the action of wind, rain, etc; to be gradually destroyed in this way
to gradually destroy something or make it weaker over a period of time; to be destroyed or made weaker in this way
vt. 腐蚀，侵蚀
vi. 侵蚀；受腐蚀

例句
Battery acid had eroded the engine.
电池酸腐蚀了发动机。
Soft drinks erode your stomach lining.
软饮会腐蚀你的胃壁。

erosion [i'rəuʒən]
n. 侵蚀，腐蚀；损害，削弱，减少；【病理学】糜烂

corrosive [kə'rəusiv]
harmful and causing bad feelings
A corrosive substance causes damage by chemical action
bitingly sarcastic <corrosive satire>

a 腐蚀性的 ；(对社会、个人情感等)有害的, 逐步起损害作用的；讽刺的，挖苦的
n 腐蚀剂，腐蚀物

licence ['laisəns] lic-合法的
n. 许可证，执照；特许
vt. 特许，许可；发给执照

licit [lisit]
allowed or legal
adj不禁止的，合法的

illicit [i'lisit]
违法的，不正当的

例句
She made some money by licit means .
他用正当的手段挣了一些钱。
Strengthening the licit drug control system.
加强合法药物管制系统;

昨日重现

2003年12月CET-6真题
It is reported that thirty people were killed in a _____ on the railway yesterday.

A.collision
B.collaboration
C.corrosion
D.confrontation

答案A