The words "wast big" can be antonyms for each other. "Wast" means small or unimportant, while "big" means large or significant. The antonym for "wast" is "big," and the antonym for "big" is "wast." It all depends on the context in which the words are used. For example, if someone says, "The wast big present was under the tree," it would mean that the present was small and insignificant. However, if they said, "The big wast factory was shut down," it would mean that the factory was large and important, but now it is not in use. In conclusion, both words can serve as antonyms for each other depending on the context of their usage.