erosion
n.
1540s, from Middle French erosion (16c.), from Latin erosionem (nominative erosio) "a gnawing away," noun of action from past participle stem of erodere "gnaw away" (see erosion). Related: Erosional.
〔李〕[e-(ex-);ros;-ionn.] n.腐蚀，侵蚀； 冲蚀 ←rod,ros (L rodere,rosum)=to gnaw or bite 蚀，咬
〔蒋〕[rod，ros咬，啮，-ion名词后缀] 腐蚀，侵蚀