Simple past tense and past participle of speculate.(verb)
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Use "speculated" in a sentence
"Rumour has it this new game could by Cliff Bleszinski's psychological horror game, the title speculated by the designer back in November last year - although we've no official details suggesting this is the case."
"Tuesday might be a foregone conclusion for Canadians, as Stephen Harper once again speculated that he would win a minority government, just like last time, as the leftist parties splinter their votes among the Liberals, NDP, and Greens."
"Last fall Goodwin speculated to me that had she stayed in academic life, she might have written a series of smaller books about less titanic figures, studies "in seriatum" of the sorts of Cabinet figures she now calls her "guys.""