rigidifying

(noun) the process of becoming stiff or rigid. Synonyms: stiffening, rigidification.

(verb) become rigid. Synonyms: rigidify. Example: "The body rigidified."

(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."