The antonyms for "more increscent," which means "increasing or growing rapidly," are "lessening," "slowing down," "diminishing," "declining," "reducing," and "shrinking." These words are usually used to describe situations where growth or progress is hindered or stunted. For instance, one might say that the company's profits are lessening due to the pandemic, or that the economy is slowing down because of inflation. Alternatively, one might comment on the diminishing numbers of endangered species, the declining quality of education, the reducing amount of available resources, or the shrinking job market. Overall, the antonyms for "more increscent" convey a sense of restraint, limitation, or regression.