1. in a manner that eats away or destroys gradually, especially through chemical action
2. in a manner that is bitterly sarcastic, harsh, or damaging to someone's feelings or reputation

Examples

• The acid worked corrosively on the metal surface, leaving deep pits.
• She spoke corrosively about her former colleague, undermining his credibility.
• Salt water acts corrosively on unprotected steel, causing rust and deterioration.
• His corrosively witty remarks often left people feeling insulted rather than amused.
• The chemical spill corrosively damaged the pipes over several months.
• She delivered her criticism corrosively, making sure everyone in the room felt the sting.