名詞 erosion:

1. (geology) the mechanical process of wearing or grinding something down (as by particles washing over it)
   同義詞：eroding, eating away, wearing, wearing away
2. condition in which the earth's surface is worn away by the action of water and wind
3. a gradual decline of something
4. erosion by chemical action
   同義詞：corrosion, corroding

1. A hole or worn spot made by abrasion or erosion.
   侵蝕處由于侵蝕或磨擦形成的洞或破處
2. A closely woven mat of brush and poles used to protect an embankment, a dike, or a dam from erosion.
   (用以護堤、壩等的)柴排，沉排，沉床荊棘和桿子的密織席，用于保護堤、壩，使不受侵蝕
3. They had to face the steady erosion of the president's credibility.
   他們不得不面對總統(tǒng)的威信日漸喪失的局面。
4. The erosion of the coastline by the sea was ignored by people.
   海水對海岸的沖刷被人們忽視了。

e.ro.sion

n.（名詞）
The process of eroding or the condition of being eroded:
腐蝕，侵蝕：腐蝕的過程或被腐蝕的狀態(tài)：
例句：
erosion of the beach; progressive erosion of confidence in our legal system; erosion of the value of the dollar abroad.
海岸的腐蝕；對我們司法體制信心的逐步削弱；海外美元價值的貶低

The group of natural processes, including weathering, dissolution, abrasion, corrosion, and transportation, by which material is worn away from the earth`s surface.
腐蝕，侵蝕：指使材料從地表磨損、消耗的一組自然過程，包括風化、溶解、磨蝕、浪蝕、腐蝕和搬運

來源：
Latin ôrôsiô ôrôsiôn- [an eating away]
拉丁語 ôrôsiô ôrôsiôn- [蠶食]
from ôrôsus [eaten away] * see erose
源自 ôrôsus [被侵蝕掉] *參見 erose

【引伸】
ero.sional
adj.（形容詞）
ero.sionally
adv.（副詞）