He viewed each job rejection as a learning opportunity and refined his interview technique accordingly.

rejection 是名词，来自动词 reject（拒绝），加上名词后缀 -ion 构成。reject 由前缀 re-（表示"回、反"）和词根 ject（投、掷）组成，字面意思是"扔回去"，引申为"拒绝"。 rejection 指"拒绝、否决"的行为或结果，在这里特指求职申请被拒绝的情况。