The antonyms for the word "re-appearances" include disappearance, vanishing, extinction, and evanescence. Disappearance refers to the act of ceasing to be visible or present, while vanishing means to disappear suddenly and completely. Extinction is the state of a species, family, or larger group having no living members, and evanescence is the gradual fading away of something. These antonyms suggest that re-appearances are a rarity or signify a return, while their counterparts imply a loss or absence. It is important to note that the context and usage of the word would determine which antonym would be most appropriate.