"mightily" in the adverb sense
1. mightily
powerfully or vigorously
"he strove mightily to achieve a better position in life"
2. mighty, mightily, powerful, right
Southern regional intensive) very to a great degree
"the baby is mighty cute"
"he's mighty tired"
"it is powerful humid"
"that boy is powerful big now"
"they have a right nice place"
"they rejoiced mightily"
Source: WordNet® (An amazing lexical database of English)
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