mightily

Adverb

• (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
    

• powerfully or vigorously
  • he strove mightily to achieve a better position in life
    

Related words

• Synonyms: 
  mighty , powerful , right