Simple past tense and past participle of degenerate.(verb)
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Use "degenerated" in a sentence
"The most pathetic thing in the world is that the Tea Party has degenerated from a real populist movement (that was years overdue) to a group of racists and nutcases trying to protect the Republicans from accountability."
"Is VDH the military historian, classicist demonstrably smarter and more reasonable than VDH the pundit, or has his brain degenerated overall like someone with mad cow disease?"
"Second, society degenerated from the 'greatest generation' boldness needed for the venture."