Plural of seven; can refer to the number 7 in multiple contexts, playing cards, or the rugby position.
From Old English 'seofon,' related to German 'sieben' and Latin 'septem'; the origin is Proto-Indo-European, making seven one of the oldest number words in English.
The number seven appears in almost every culture's mystical traditions—seven wonders, seven deadly sins, seven continents. Scientists think humans naturally group things in fives to sevens because that's about the limit of our working memory.
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