The antonyms for the phrase "more coefficient" are "less coefficient," "reduced coefficient," "lower coefficient," or "decreased coefficient." A coefficient is a mathematical term used to describe a constant multiplier or factor that is applied to a variable or an equation to produce a new result. The antonyms suggest a reduction in the value of that constant or variable, indicating a decrease in the effect of the coefficient on the equation. In many cases, lowering the coefficient can result in a less significant impact on the final outcome, while increasing it can lead to a more significant impact. Therefore, understanding the antonyms of "more coefficient" is essential in accurately interpreting mathematical equations.