介绍： 1.*erode [ɪ'rəʊd]
v. 侵蚀，腐蚀 erosion n.
Wind and rain have eroded the statues into shapeless lumps of stone.
风雨侵蚀使雕像变成了一块块毫无形状的石头。

2.corrode [kə'rəʊd]
v. 侵蚀，腐蚀 corrosion n.
Rain water corroded the metal pipes.
雨水腐蚀了金属管子。

3.degenerate [dɪ'dʒen(ə)rət]
v. 退化，堕落
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介绍： 1.*erode [ɪ'rəʊd]
v. 侵蚀，腐蚀 erosion n.
Wind and rain have eroded the statues into shapeless lumps of stone.
风雨侵蚀使雕像变成了一块块毫无形状的石头。

2.corrode [kə'rəʊd]
v. 侵蚀，腐蚀 corrosion n.
Rain water corroded the metal pipes.
雨水腐蚀了金属管子。

3.degenerate [dɪ'dʒen(ə)rət]
v. 退化，堕落
adj. 堕落的，退化的
a degenerate young man 堕落的年轻人

4.*deteriorate [dɪ'tɪərɪəreɪt]
v.恶化，变坏
She went into the hospital when her condition began to deteriorate.
她的状况开始恶化她才去了医院。

5.aggravate ['ægrəveɪt]
v. 加重，使恶化，激怒
The treatment only aggravated the condition.
治疗只是加重了他的病情。

6.*lighten ['laɪt(ə)n]
v. 减轻，照亮
lighten the burden 减轻负担

7.enlighten [ɪn'laɪt(ə)n]
vt. 启蒙
enlightenment n. Should the function of children's television be to entertain or to enlighten?
小孩的电视节目是为了娱乐还是为了启蒙？

8.*ease [iːz]
v. 减轻，缓和
ease the pain 缓解疼痛
ease the burden of social welfare costs 减轻社会福利成本的负担
n. 轻松，舒适，安逸
with ease 容易，不费力地
at ease 安逸，自在

9.*relieve [rɪ'liːv]
v. 减轻，缓解
relieve the pain 减轻疼痛/ relieve the famine 缓解饥荒
relief n. 轻松，解脱；救济

10.*alleviate [ə'liːvɪeɪt]
v. 减轻，缓和
alleviate the pain /suffering /evil减轻疼痛/痛苦/罪恶