noun
law of diminishing marginal utility
Economic principle that the additional satisfaction from consuming one more unit declines as consumption increases.
限界効用逓減の法則は、ミクロ経済学の基本的な概念の一つです。
The law of diminishing marginal utility is one of the fundamental concepts of microeconomics.
Compound of 限界 (limit, marginal), 効用 (utility), 逓減 (gradual decrease), and 法則 (law). A direct translation of the English economic term.