sabbaton (Greek #4521)
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 usage: sabbath (day), week.
Pronounce: sab'-bat-on
Origin: of Hebrew origin (07676)