Which term refers to the act of becoming or making less?

The term "decrease" refers specifically to a reduction in quantity, size, extent, or value. It encompasses the process of becoming smaller or less in amount, and is often used in various contexts including mathematics, economics, and everyday scenarios. When something decreases, it implies a clear measurable reduction from a previous state, making it a precise term for conveying the idea of lessening.

In contrast, while "reduction," "diminish," and "minimize" relate to the idea of making something less, they possess different nuances. "Reduction" typically refers to a deliberate act or process that results in less, but it often denotes the outcome rather than the change itself. "Diminish" implies a gradual process of becoming less, which may not always have a quantifiable measure. "Minimize" suggests reducing to the smallest possible amount, often used in contexts where limiting impact is the goal. Hence, "decrease" stands out as the most straightforward term that directly conveys the act of becoming less.