the Almighty: a name for God that points to his overwhelming might and power.
Shaddai is one of the great names for God in the Hebrew Bible, traditionally rendered "the Almighty." It almost always names God in his sheer power, the kind of power that can promise a childless couple a nation of descendants, and the kind that can feel crushing when it falls on a sufferer. The same name carries both sides.
In the early stories of Abraham, Isaac, and Jacob it appears joined to the ordinary word for God, as "God Almighty," and it is tied to promises of children, growth, and blessing. Later, in the book of Job above all, it becomes the favorite poetic name for God, used by every speaker in the book. There it leans toward God as the one whose power is beyond questioning and sometimes beyond understanding, the strong one who wounds and heals, blesses and afflicts.
What does NOT change is who is meant: it is always the one God, and always God seen from the angle of his might. So this is a single name with two settings, the covenant God who promises increase and the all-powerful God whose strength a person meets in both blessing and hardship, rather than two different words.
The origin of the name is genuinely uncertain, and the old translations themselves reached for "the Almighty" without being sure of its roots. That history is laid out in the scholarship below; the safe thing to say in plain terms is that Shaddai presents God as overpoweringly strong.