From shadad; the Almighty -- Almighty.
see HEBREW shadad
H7706. Shadday
שַׁדַּי48 noun masculine, of deity (etymology dubious (I) Aq Symm Theod ἱκανός; Rabb שֶֿׁ + דַּי (self-) sufficient, no moderns. (2) = almighty, √ שׁדד + י = Thes De Di Sta, or √שׁדה = שׁדד, intensive noun Ew§ 155 c, but שׁדד (q. v.) is deal violently not simply mightily; compare ᵐ5 παντοκράτωρ14(15) t. (but in Pentateuch ׳אלשׁ is ό Θεόχ μου, σου, etc.), ᵑ9 mostly omnipotens. (3) < conjecture for original שֵׁדַי (see שֵׁד) my sovereign lord, "" בעלי אֲדֹנָי, NöSBA 1880, 775; ZMG xlii (1888), 481; HoffmPh. Inscr. 53; used of foreign deities (Deuteronomy 32:17), and so discredited (compare בַּעַל). — > other conjectures, e.g. RSOTJC, 424 √שׁדה pour forth (God as rain-giver); DlPr 96 followed by Assyrian šadû, high, ilu šâdû a, CheComm. Isaiah 2:148, or šadû, mountain, also in proper name; see further DrGen 404 ff.); —
1 שַׁדַּי Numbers 24:4, 16 (J E, poem), and so as archaism Ruth 1:20-21, Psalm 68:15; 91:1; Joel 1:15 = Isaiah 13:6; Ezekiel 1:24 (strike out Co); especially Job 5:17 + 30:t. Job (+ 19:29 Ew Di, reading ׳שׁ for שׁדין).
2 שַׁדַּי אֵל Genesis 49:25 (poem; so read for שׁ ׳אֵת, see ᵑ6 ᵐ5 ⅏ Saad, Hebrew Manuscripts), and so, as archaism, divine name of patriarchs in P, 17:1; 28:3; 35:11; 48:3; Exodus 6:3; Genesis 43:14 (RP); so Ezekiel 10:5 (strike out Co; but ᵐ5 Σαδδαι).
שַׁדּ֯יּן Job 19:29 see דין above.
שׁדם √of following; meaning unknown).