许多人抱怨学校的纪律体系过于僵化。

Many complained that the school's disciplinary system was far too ___rigid.

在旧规章制度的僵化框架内，进展十分困难。

Progress was difficult within the ___rigid framework of the old regulations.

他对传统的固执坚守阻碍了任何有意义的创新。

His ___rigid adherence to tradition prevented any meaningful innovation.