(tr; often passive) to convert (organic material, esp plant material) into a fossilized form by impregnation with dissolved minerals so that the original appearance is preserved
2.
to make or become dull, unresponsive, insensitive, etc; deaden
3.
(tr; often passive) to stun or daze with horror, fear, etc
[C16: from French pétrifier, ultimately from Greek petra stone, rock]
1594, from M.Fr. pétrifier "to make or become stone," from L. petra "rock" + -ficare, from facere "to make, do" (see factitious). Metaphoric sense of "paralyze with fear or shock" first recorded 1771.