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