Apparently from sadeh; a cultivated field; -- blasted, field.
see HEBREW sadeh
H7709. shedemah
[שְׁדֵמָה] noun feminine field; — only plural: absolute שְׁדֵמוֺת Habakkuk 3:17; Jeremiah 21:40 Qr (> Kt השׁרמוֺת); construct שַׁדְמ(וֺ)ת Deuteronomy 32:32 2t.; — fields, as cultivated 32:32, also (with verb singular) Isaiah 16:3; Habakkuk 3:17; as locality 2 Kings 23:4, area Jeremiah 31:40. — שְׁדֵמָה Isaiah 37:27 see שְׁדֵפָה.