The company is investigating who the leaker was that revealed the new product designs.

leaker 是由动词 leak（泄漏）加上后缀 -er 构成的名词，表示"进行泄漏行为的人"。leak 本意是"液体或气体从容器中漏出"，引申为"秘密或信息的泄露"。 leaker 指"泄露信息的人"，即"泄密者"。