adjective
petrified
PET-rih-fyd/ˈpetrɪfaɪd/
Changed into stone or a stone-like substance.
The petrified wood preserves its growth rings in solid stone.

Etymology
The literal image is being made into stone. Applied to fright, it describes people so overwhelmed that they seem unable to move, as though turned to stone.
In context
I'm afraid of heights. You mean, once he made me dive? Everyone was yelling at me to leave, and I just stood there, petrified.
More examples
- Petrified logs lie scattered across the desert.
- The museum displays a petrified tree trunk.
- Polishing brings out the colors in petrified wood.
Forms
petrified
petrify verb — To turn into stone or a stone-like substance.
petrification noun — The process of becoming stone or stone-like material.
Similar words
- fossilized
- Preserved from the distant past, not necessarily changed into stone.
- mineralized
- Containing added or replacement minerals, without necessarily becoming stone-like.