"petrifying" in the verb sense
1. petrify
cause to become stonelike or stiff or dazed and stunned from fright
"The horror petrified his feelings"
"Fear petrified her thinking"
2. lapidify, petrify
change into stone
"the wood petrified with time"
3. rigidify, ossify, petrify
make rigid and set into a conventional pattern
"rigidify the training schedule"
"ossified teaching methods"
"slogans petrify our thinking"
"petrifying" in the adjective sense
1. petrifying
paralyzing with terror
Source: WordNet® (An amazing lexical database of English)
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