随着年岁的增长，他思想的僵化使得他越来越难以接受新观念。

The ___calcification of his thinking made it harder for him to accept new ideas as he grew older.

医生发现他关节的钙化导致活动受限。

The doctor found that ___calcification in his joints caused limited mobility.

机构审批流程的僵化严重拖慢了新项目的进展。

The ___calcification of the approval process significantly delayed new projects.