Emily Dickinson Lexicon

MIGHT'I-LY, adv. [mitily. from mighty.]

1. With great power, force or strength; vigorously; as, to strive mightily.
2. Vehemently; with great earnestness. Cry mightily to God. Jonah iii.
3. Powerfully; with great energy. Whereto I also labor, striving according to his working, which worketh in me mightily. Col. i.
4. With great strength of argument. He mightily convinced the Jews. Acts xviii.
5. With great or irresistible force; greatly; extensively. So mightily grew the word of God and prevailed. Acts xix.
6. With strong means of defense. Fortify thy power mightily. Nah. ii.
7. Greatly; to a great degree; very much. I was mightily pleased with a story applicable to this piece of philosophy. Spectator. [Admissible in colloquial and familiar language.]