ter·ri·bly / ˈterəblē/ • adv. 1. very; extremely: I'm terribly sorry it was all terribly frustrating. 2. very badly or unpleasantly: they beat me terribly. ∎ very greatly (used to emphasize something bad, distressing, or unpleasant): your father misses you terribly.
"terribly." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (January 19, 2019). https://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/terribly
"terribly." The Oxford Pocket Dictionary of Current English. . Retrieved January 19, 2019 from Encyclopedia.com: https://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/terribly