ABYSS n.
A bottomless or unfathomed depth, gulf, or chasm; hence, any deep, immeasurable, and, specifically, hell, or the bottomless pit. Ye powers and spirits of this nethermost abyss. Milton. The throne is darkness, in the abyss of light. Dryden.
ACCOUNT n.
explanatory of some event; as, no satisfactory account has been given of these phenomena. Hence, the word is often used simply for reason, ground, consideration, motive, etc.; as, on no account, on every account, on all accounts.