Ignoring women's opinions in the workplace is effectively marginalizing their voices.

marginalizing 是动词 marginalize 的现在分词形式。marginalize 由词根 margin（边缘）和后缀 -ize（使...化）组成，字面意思是"使边缘化"，指将某些人或群体排除在主流之外，使其影响力或重要性降低。