Corrode
/kəˈɹəʊd/
verb
To eat away bit by bit; to wear away or diminish by gradually separating or destroying small particles of, as by action of a strong acid or a caustic alkali.
To consume; to wear away; to prey upon; to impair.
“My morale is being corroded day by day.”
To have corrosive action; to be subject to corrosion.