ossified

(verb) become bony. Synonyms: ossify. Example: "The tissue ossified."

(verb) make rigid and set into a conventional pattern. Synonyms: rigidify, ossify, petrify. Examples: "Rigidify the training schedule." "Ossified teaching methods." "Slogans petrify our thinking."

(verb) cause to become hard and bony. Synonyms: ossify. Example: "The disease ossified the tissue."

(adj) set in a rigidly conventional pattern of behavior, habits, or beliefs. Synonyms: fossilized, fossilised. Examples: "Obsolete fossilized ways." "An ossified bureaucratic system."