The company's new policy marginalizes many senior employees by ignoring their opinions.

marginalizes 是动词 marginalize 的第三人称单数形式。marginalize 由词根 margin（边缘）和后缀 -ize（使...化）组成，字面意思是"使边缘化"，指将某人或某群体排除在主流之外，使其影响力或重要性降低。