ossify (ˈɒsɪˌfaɪ )
1. to convert or be converted into bone
2. (of habits, attitudes, etc) to become inflexible
calcify (ˈkælsɪˌfaɪ )
1. to convert or be converted into lime
2. to harden or become hardened by impregnation with calcium salts
petrify (ˈpɛtrɪˌfaɪ )
1. to convert or be converted into a fossilized form by impregnation with dissolved minerals so that the original appearance is preserved
2. to make or become dull, unresponsive, insensitive; deaden
3. to stun or daze with horror, fear
terrify (ˈtɛrɪˌfaɪ )
to inspire fear or dread in; frighten greatly

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