The phrase "more argute" refers to being sharper or more acute. Its antonyms, therefore, would refer to the opposite of sharpness. Some possible antonyms for "more argute" could include dull, blunt, or obtuse. These words could be used to describe the lack of sharpness in an object's edges or a person's mental acuity. Additionally, "more argute" could refer to a heightened level of intelligence or wit, so antonyms in this sense could include less intelligent or less witty. Regardless of the context, the antonyms for "more argute" would describe a lack of sharpness, precision, or intelligence.