"ossify" in the verb sense
1. ossify
become bony
"The tissue ossified"
2. rigidify, ossify, petrify
make rigid and set into a conventional pattern
"rigidify the training schedule"
"ossified teaching methods"
"slogans petrify our thinking"
3. ossify
cause to become hard and bony
"The disease ossified the tissue"
Source: WordNet® (An amazing lexical database of English)
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