From shiyth; a basis, i.e. (figuratively) political or moral support -- foundation, purpose.
see HEBREW shiyth
H8356. shathah
or shath [שָׁת] noun masculine (AlbrZAW xvi (1896), 84) foundation, stay (of society) (√ שׁית Thes Köii. l. 172); — plural יֵהָרֵס֑וּן הַשָּׁתוֺת Psalm 11:3 (probably figurative of established usages, laws, etc., ᵑ9 leges, Symm θεσμοί, so Hup-Now Bae Che (1888) and others; > Thes and others of nobles); Thes puts here also שָֽׁתֹתֶ֫יהָ Isaiah 19:10 (so ᵑ0 probably intends), which Ew Di Kit then interpret of working-classes, "" שֶׂכֶר עשֵֹׁי; but perhaps opposed to of this, the upper classes, so as to include all ranks of society, Thes De CheComm.; CheHpt Buhl and others שֹׁתֶיהָ weavers of it (compare Du Marti), see III. שׁתה.