ossify

To transform (or cause to transform) from a softer animal substance into bone; particularly the processes of growth in humans and animals.

[…], nor do all bones of the same skeleton ossify during the samе period of time.

To become (or cause to become) inflexible and rigid in habits or opinions.

Before long, the entire organization ossifies.

Possession of absolute knowledge would ossify the human spirit, quenching human creativity;

To grow (or cause to grow) formulaic and permanent.

This accidental repartition gets repeated, develops advantages of its own, and gradually ossifies into a systematic division of labour.

Now, in turn, we apply a revolutionary critique that […] ossifies into a rhetoric to become "the monstrous Latin of a monstrous church."

To calcify.

The cartilages become brittle, and in many instances are ossified; the ligaments are rendered harder, but are less capable of resisting extension.