Xmas is a common abbreviation of the word Christmas. It is sometimes pronounced /ˈɛksməs/, but Xmas, and variants such as Xtemass, originated as handwriting abbreviations for the typical pronunciation /ˈkrɪsməs/. The “-mas” part is from the Latin-derived Old English word for Mass,[1] while the “X” comes from the Greek letter Chi, which is the first letter of the Greek word Χριστός which comes into English as “Christ”.[2]

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