stonify

From stone + -ify.

stonify (third-person singular simple present stonifies, present participle stonifying, simple past and past participle stonified)

1. (obsolete) To petrify (as a mineral, to harden).
2. (ambitransitive, dated) To become stone, to turn to stone; to cause (something or someone) to become stone, to turn (something) to stone.
3. (rare) To immobilize.