Found 2 items, similar to mightily.
English → English (WordNet) Definition: mightily mightily adv 1: powerfully or vigorously; “he strove mightily to achieve a better position in life” 2: to a great degree; “rejoiced mightily at the news”
English → English (gcide) Definition: Mightily Mightily \Might"i*ly\, adv. [From Mighty.] 1. In a mighty manner; with might; with great earnestness; vigorously; powerfully. [1913 Webster] Whereunto I also labor, striving according to his working, which worketh in me mightily. --Col. i. 29. [1913 Webster] 2. To a great degree; very much. [1913 Webster] Practical jokes amused us mightily. --Hawthorne. [1913 Webster]