Disappear means to vanish, to cease from sight, to be lost or to fade away. Antonyms for the word "disappear" are words that mean the opposite of disappearing, such as appear, emerge, materialize or appear. "Appear" means to become visible, to arrive or to manifest. "Emerge" means to come out from hiding, to appear suddenly or to arise. "Materialize" means to become real or to come into being. "Appear" is the most commonly used antonym for disappear. These antonyms help to understand the concept of disappear by describing the opposite state of appearance or existence.