Why do some words have "X" as a substitute?

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Music by Eric Matyas
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Track title: Secret Catacombs

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Chapters
00:00 Why Do Some Words Have &Quot;X&Quot; As A Substitute?
00:18 Accepted Answer Score 36
01:21 Answer 2 Score 2
01:51 Answer 3 Score 1
02:09 Answer 4 Score 0
02:52 Thank you

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Tags
#abbreviations

#avk47