mightily

mightily is an   Adjective

Definition:

[1] In a mighty manner; with might; with great earnestness; vigorously; powerfully. Whereunto I also labor, striving according to his working, which worketh in me mightily. Col. i. 29.

[2] To a great degree; very much. Practical jokes amused us mightily. Hawthorne.

Synonyms: