From shabath; cessation, i.e. Destruction -- sabbath.
see HEBREW shabath
H4868. mishbath
[מִשְׁבָּת] noun [masculine] cessation, annihilation; — plural suffix עַלמִֿשְׁבַּתֶּ֑הָ Lamentations 1:7 (ᵐ5 ἐπὶ κατοικεσίᾳ αὐτῆς = עַלשִֿׁבְתָּהּ; MartiLCB 1895, Mar. 2, 282 עַלשְֿׁבִיתָהּ her captivity).
שָׁגֵא see שָׁגֵה.