insanely

Adverb

• (used as intensives) extremely
  • she was madly in love
    
  • deadly dull
    
  • deadly earnest
    
  • deucedly clever
    
  • insanely jealous
    

• in an insane manner
  • she behaved insanely
    
  • he behaves crazily when he is off his medication
    
  • the witch cackled madly
    
  • screaming dementedly
    

Related words

• Synonyms: 
  madly , deadly , deucedly , devilishly , crazily , dementedly