mid-15c., omnipotens, "unlimited divine power," from Old French omnipotence, from Late Latin omnipotentia "almighty power," from Latin omnipotentem (nominative omnipotens) "all-powerful, almighty," from omnis "all" (see omni-) + potens (genitive potentis) "powerful" (see potent). Related: Omnipotency (late 15c.).
This attribute is in theology differentiated from the abstract idea of omnipotence, understood as capability of doing anything whatever (with no limitation from moral considerations), and is limited by the holiness of God, in accordance with which it is impossible for him to do wrong. [Century Dictionary]