From an unused root meaning to push aside; contempt -- despite(-ful).
H7589. sheat
שְׁאָט noun [masculine] despite, contempt (expanded from שׁוּט above, Köi. 439; ii. 1. 486); — absolute בְּנֶפֶשׁ ׳בִּשׁ Ezekiel 25:15 with despite in the soul; construct נֶפֶשׁ ׳בִּשׁ 36:5; suffix בְּנ ׳בְּכָלשָֽֿׁאטְךָ 25:6 (Ges§ 23c Köii. 1. 67).
שׁוּל (√ of following; compare Arabic hang down loose).