The supermarket achieved cost-cutting by reducing the use of packaging materials.

cost-cutting 是由名词 cost（成本）和动词 cut（削减）组成的复合词，加上连字符和-ing 后缀构成的名词形式。cost 指"费用、成本"，cut 指"削减、减少"。cost-cutting 合起来表示"成本削减、降低成本"的措施或行为。