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Phrase(s): boom out
[for a loud sound] to sound out like thunder. • His voice boomed out such that everyone could hear. • An explosion boomed out and frightened us all., Phrase(s): boom something out
[for someone] to say something very loud; to shout. • Will someone with a loud voice boom the names out? • The announcer boomed out the names of the players.
McGrawhill's American Idioms And Phrasal Verbs