erode 
/ɪˈroʊd/ verb
erodes; erod·ed; erod·ing /ɪˈroʊd/ verb : to gradually destroy (something) or to be gradually destroyed by natural forces (such as water, wind, or ice) [+ obj] ▪ Crashing waves have eroded the cliffs along the beach. — often used as (be) eroded ▪ The shoreline was badly eroded by last winter's storms. — often used figuratively ▪ Years of mismanagement have eroded the quality of their products. ▪ The value of your savings can be eroded by inflation. [no obj] ▪ The shoreline has eroded badly. — often used figuratively ▪ Support for the new law has been eroding steadily.
