retiring

尽管他很有才华，但他性格内向，很少在聚会上发言。

Despite his talents, he has a ___retiring nature and rarely speaks at parties.

这个羞怯的学生总是选择离讲台最远的座位。

The ___retiring student always chose the seat farthest from the lecturer.

这位低调的小说家婉拒了所有关于她新书的采访邀请。

The ___retiring novelist politely declined every interview request for her new book.