σάββατον
sábbaton
sab'-bat-on
of Hebrew origin (שַׁבָּת); the Sabbath (i.e. Shabbath), or day of weekly repose from secular avocations (also the observance or institution itself); by extension, a se'nnight, i.e. the interval between two Sabbaths; likewise the plural in all the above applications.

KJV translates as: sabbath (day), week