tautology

说'单身汉就是未婚男性'是一个同义反复的陈述。

Saying 'a bachelor is an unmarried man' is a ___tautology.

编辑删掉了'过去的历史'，指出这是同义反复。

The editor struck out 'past history,' pointing out it was a ___tautology.

在邀请函上印'年度周年庆典'是一个尴尬的同义反复，好在实习生发现了。

Printing 'annual anniversary' on the invitations was an embarrassing ___tautology the intern caught.