Dolores Umbridge was standing in the doorway wrapped in a green tweed cloak that greatly enhanced her resemblance to a giant toad, and was smiling in the horrible, sickly, ominous way that Harry had come to associate with imminent misery.
There was a commotion outside and several large Slytherins entered, each gripping Ron, Ginny, Luna and — to Harry’s bewilderment — Neville, who was trapped in a stranglehold by Crabbe and looked in imminent danger of suffocation.
He kept reliving Saturdays meeting in his mind: all those people, coming to him to learn Defence Against the Dark Arts… and the looks on their faces as they had heard some of the things he had done… and Cho praising his performance in the Triwizard Tournament — knowing all those people did not think him a lying weirdo, but someone to be admired, buoyed him up so much that he was still cheerful on Monday morning, despite the imminent prospect of all his least favourite classes.
There are no more uses of "imminent" in the book.
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Authorities warned of imminent danger of flooding.