The word "in-flux" means the state of constant change or flowing. Its antonym refers to a state of stability or lack of change. The antonyms for the word "in-flux" include terms such as fixed, steady, stable, constant, unvarying, and unchanging. These words describe a situation where there is no fluctuation or motion. They imply a situation that is not in a state of change or development. In contrast to "in-flux," they suggest a state of consistency, sameness, and regularity. Antonyms for "in-flux" describe a situation that is not subject to modification, alteration or modification.