1610s, a back-formation from erosion, or else from French éroder, from Latin erodere "to gnaw away, consume" (see erosion). Related: Eroded; eroding. Originally of acids, ulcers, etc.; geological sense is from 1830.
erode e·rode (ĭ-rōd')
v. e·rod·ed, e·rod·ing, e·rodes
To wear away by or as if by abrasion.
To eat into; ulcerate.