Mightily | Definition of mightily by Merriam-Webster

Full Definition of MIGHTILY

1

: in a mighty manner : vigorously <applauded mightily>

2

: very much <depressed me mightily>

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before 12th century

Synonyms: achingly, almighty, archly, awful, awfully, badly, beastly, blisteringly, bone, colossally, corking, cracking, damn, damned, dang, deadly, desperately, eminently, enormously, especially, ever, exceedingly (also exceeding), extra, extremely, fabulously, fantastically, far, fiercely, filthy, frightfully, full, greatly, heavily, highly, hugely, immensely, incredibly, intensely, jolly, majorly, very, mighty, monstrous [chiefly dialect], mortally, most, much, particularly, passing, rattling, real, really, right, roaring, roaringly, seriously, severely, so, sore, sorely, spanking, specially, stinking, such, super, supremely, surpassingly, terribly, that, thumping, too, unco, uncommonly, vastly, vitally, way, whacking, wicked, wildly

1

: very forcefully <He shouted mightily.>

2

: very much <Both cities flourished mightily … — Norton Juster, The Phantom Tollbooth>

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