hitting something hard and loudly, usually repeatedly; the loud sound produced by this.
From Old Norse 'bang' meaning to hammer, likely imitative in origin (the word sounds like the thing it describes). Germanic languages adopted variations of this onomatopoetic word.
Many action words like 'bang,' 'crash,' 'splash,' and 'pop' are onomatopoeia—they literally sound like the action they describe, which shows how humans created language partly by imitating the sounds of the world around them.
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