Simple past tense and past participle of rigidify.(verb)
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Use "rigidified" in a sentence
"The Democratic Party, which has rigidified into the party of more spending and higher taxes while ignoring the country's mounting deficits."
"The problem is also with our rigidified scientific way of approaching health -- we're not being thorough enough in our science."
"But it also tends to dissolve or centrifuge others — network standard English is currently dying in America, precisely because of the crack-up of rigidified media monopolies, and global English is growing luxuriantly in all different directions."