terrifically terrifically /tɝˈɪfɪkli/

adverb

1. Extremely well  ( marvellously [Canadian, British] , terrifically , toppingly [Archaic] , marvelously [American] , superbly , wonderfully , wondrous [Archaic] , wondrously )
   extremely well
    Her voice is superbly disciplined
   her voice is superbly disciplined
    The colors changed wondrously slowly
   the colors changed wondrously slowly