Rigor mortis is the phenomenon where part or all of the body stiffens after death.

His opinion is rigid, and it's hard to change.

The plan is too rigid, making it difficult to change.

His body stiffened with fear.

His body is very healthy.

Part of this movie is based on actual events.

After his death, he donated all his property to a charity according to his will.

We need to review the whole plan.

Looking at it as a whole, his plan is likely to succeed.

This phenomenon remains unexplained for scientists.