roar
                  // roars, roaring, roared
           1
                  If something roars, it makes a very loud noise.
                  The wind roared in the forest.
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                  roar
                  I could hear the roar of traffic outside.
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           2
                  If someone roars, they shout very loudly.
                  `Forward with the Revolution,' the crowd roared back.
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           3
                  When a lion roars, it makes the loud sound typical of a lion.
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                  roar
                  The lion let out one of its roars.
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