ossified (Adjective) — Set in a rigidly conventional pattern of behaviour, habits, or beliefs. ex. "an ossified bureaucratic system"
ossified (Verb) — Become bony. ex. "The tissue ossified"
ossified (Verb) — Make rigid and set into a conventional pattern. ex. "ossified teaching methods"
ossified (Verb) — Cause to become hard and bony. ex. "The disease ossified the tissue"