Old Testament Hebrew Lexical Dictionary
Strong's #7706 - שַׁדַּי
1) almighty, most powerful
1a) Shaddai, the Almighty (of God)
Jeff Brenner, Ancient Hebrew Research Center Used by permission of the author.
שַׁדַּי m., most powerful, Almighty, an epith. of Jehovah; sometimes with אֵל prefixed, Genesis 17:1, 28:3 Exodus 6:3 sometimes simply, Job 5:17, 6:4 8:3 13:3 and often in that book; Genesis 49:25; Ruth 1:20, 21, etc. It is the plur. excellentiæ, from the sing. שַׁד powerful (compare Arab. شَدِيدُ powerful, strong; root שָׁדַד No. 1); with the plur. termination (Lehrg. p. 523). This has indeed been called in question by Verbrugg. (de Nominum Hebræorum, pl. Numero, ed. 2, Erlang. 1752) and Ewald (Hebr. Gram., p. 298, 423); but without good grounds. LXX. often παντοκράτωρ. Vulg. in Pentat. Omnipotens.
the Sixth Week after Easter