Corrosive means capable of wearing away or destroying something gradually through chemical action. A corrosive substance, like strong acid, can eat through metal, burn skin, or dissolve materials it touches. In chemistry labs, bottles containing corrosive liquids display warning labels showing a hand being burned or metal being eaten away.

The word also describes things that gradually destroy or damage in a non-physical way. A corrosive lie can eat away at a friendship over time, weakening trust bit by bit. Corrosive gossip can damage someone's reputation. When anger becomes corrosive, it doesn't just hurt once: it keeps causing damage, like acid slowly burning through metal.

Think of rust on a bicycle: corrosion happens gradually, weakening the metal over time. Similarly, negative habits or attitudes can have a corrosive effect on your character or relationships. The word suggests damage that happens slowly but persistently, making it especially dangerous because you might not notice until serious harm has occurred.

The opposite of corrosive would be protective or strengthening. While corrosive things tear down and destroy, other forces build up and preserve.