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rollercoaster
noun
°An amusement ride consisting of a buggy on a track that rises and falls and twists and turns.
°(by extension) Any situation in which there are violent changes in status.
adjective
°Of or like a rollercoaster.
"Life with him was a rollercoaster ride."
synonyms: big dipper, switchback, merry-go-round, ride more» , saga, seesaw, soap opera, stir, yo-yo