Simple past tense and past participle of loom.(verb)
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Use "loomed" in a sentence
"A phrase loomed up in her mind, summoned from her unconscious."
"In the corner, a dressmaker's mannequin loomed, its hourglass figure a little more curvy than those belonging to the Parisian woman passing behind me, on the trottoir (I could see their reflections in the shop's window, where my nose now flattened up against the glass)."
"That afternoon, in spite of the Israeli warships lurking in the distance and the Israeli planes lancing the skies, my upcoming midterm loomed larger in my mind."