the world > relative properties > quantity > greatness of quantity, amount, or degree > high or intense degree > [adverb] > in or to a greater degree or extent > specifically of something bad (2)
As an intensifier, with verbs of hurting, harming, disturbing, fearing, hating, etc.: more greatly, severely, or intensely; in a greater degree.
As an intensifier, with verbs of hurting, harming, hating, etc.: more greatly, severely, or intensely; in a greater degree; = worse, adv. 3b.