The antonyms for the word "de-creased" are increased, expanded, grown, enlarged, and augmented. When something "increases," it goes up or gets bigger. When something "expands," it spreads out or extends. When something "grows," it becomes bigger or taller. When something "enlarges," it increases in size or scope. And when something "augments," it becomes greater in size or value. These antonyms signify a change in quantity, size, or value that is greater or larger than before. So, when the opposite of decreased occurs, it is a positive sign of growth or improvement.