Simple past tense and past participle of manifest.(verb)
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Use "manifested" in a sentence
"Yet the White House on Tuesday once again manifested an indifference to the suffering of victimized homeowners when press secretary Robert Gibbs warned of the "unintended consequences to a broader moratorium.""
"The fact that the Cthulhu Mythos manifested from a series of weird tales makes it easier to use."
"While their opening upon a margin manifested itself as greatness, their comportment off it provided visible evidence to all watching which as group they were unimpressive."