Meaning

noun a day of rest and worship: Sunday for most Christians; Saturday for the Jews and a few Christians; Friday for Muslims

originFrom Middle English sabat, sabbat, sabath, from Old English sabat and Old French sabbat, both from Latin sabbatum, from Ancient Greek σάββατον (sábbaton, “Sabbath”), from Hebrew שַׁבָּת (shabát, “Sabbath”), with the spelling ending in -th, probably influenced by the traditional transliteration of the Hebrew as shabbāth, being attested since the 14th century and widespread since the 16th. Doublet…

Etymology from Wiktionary, CC BY-SA 3.0