Almost in the center of it, above the Prechistenka Boulevard, surrounded and sprinkled on all sides by stars but distinguished from them all by its nearness to the earth, its white light, and its long uplifted tail, shone the enormous and brilliant comet of 1812—the comet which was said to portend all kinds of woes and the end of the world.
There are no more uses of "portend" in the book.
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I fear the election results portend greater violence in the region.
Few heeded the sign, and not even Bilbo yet had any notion of what it portended.