So this is the dreaded Bight of Benin.The etymology is from the curve in the shoreline that creates the bay. Bight shares it etymology with bow. You might ask does that mean the weapon bow, or the supports that bow under a heavy weight, or the subject that bows down to the queen, or the bow on a package, or the bow of a ship, or a bow tie?
Well the answer would be all of the above. They all derive from a root meaning curve or bend. Even with different pronunciations, they still share the same root.