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thunderous roar; roaring sound
雷の轟音で目が覚めた。
I woke up to the thunderous roar of lightning.
爆発の轟音が街中に響き渡った。
The thunderous roar of the explosion echoed throughout the city.
工事現場から聞こえてくる轟音が一日中続いた。
The roaring sound coming from the construction site went on all day.