Simple past tense and past participle of ruminate.(verb)
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Use "ruminated" in a sentence
"And I kind of ruminated on that for a couple of days."
"It seems that when Sabathia ruminated a little too long over the seven-year, $161 million contract the Yankees offered him after the 2008 season, Cashman, nervous that Sabathia might sign somewhere else, sealed the deal by including a clause that gave the big lefty the option of walking away after the third year."
"They have ruminated deeply about these moves and interactions, and this is especially clear in the interplay between showing the thing to their students, helping the students do it, and then talking about it."