(~s, corroding, ~d)
1.
If metal or stone ~s, or is ~d, it is gradually destroyed by a chemical or by rust.
He has devised a process for making gold wires which neither ~ nor oxidise...
Engineers found the structure had been ~d by moisture...
Acid rain destroys trees and ~s buildings.
VERB: V, be V-ed, V n
~d
The investigators found that the underground pipes were badly ~d.
ADJ
2.
To ~ something means to gradually make it worse or weaker. (LITERARY)
Suffering was easier to bear than the bitterness he felt corroding his spirit...
VERB: V n